https://www.asus.com/us/Motherboards/PRIME-B250M-A/HelpDesk_CPU/. It won't start in safe mode and won't bring up "set-up" or "boot sequence". It's an older computer and not worth the expense of just replacing parts at random. Have tried with and without RAM installed, and have tried RAM in each slot. Plug in the power cord to the power supply, and cross the two Power ON contacts for the front panel power switch which are located on the board. Have tried all fixes listed. Opened the case. I know that the PSU and CPU fan are good - I have installed with another motherboard and all works perfectly. Open the case and remove the CMOS battery for about 10 minutes. No sign of overheating, capacitors all look good, am assuming it is motherboard or hard drive? Register a free account to unlock additional features at BleepingComputer.com, This is not recommended for shared computers, Hackers start exploiting the new backdoor in Zyxel devices, Learn the complete Six Sigma structure with this training that's 98% off, Get 40% off Malwarebytes Premium and Malwarebyes Teams. 3. So...the most likely suspect is that the mainboard failed. The 5 volts is good, ie the LED on the mOBO. Then plug power cable in … - I dusted the case, (it was not that bad anyway). Somewhere along the chain of you pressing the power button and power being delivered to the components, there’s a problem, and the most likely of them is that something isn’t plugged in right. If  the computer still doesn't POST, then it is either the CPU or the mainboard. You can check your computer manual to find where this jumper is located. Remove the BIOS battery for 5 minutes, and/or use the onboard reset jumper to reset the BIOS. So...the most likely suspect is that the mainboard failed. I am building a new PC but am currently tearing my hair out trying to work out what the problem is. The computer beeps every few seconds. Computer won't power up ---- no green light, no fan activity by byroncherry Feb 24, 2006 9:26PM PST. No big deal I thought, maybe I just need to set the MBR or something. When I push the power button the CPU fan and cooling fan twitch but the computer wont start. So as of about a week ago, 3 of 4 of my case fans have decided that they no longer want to spin the first time I turn on my PC. Initially, the fans spin about half of a rotation before they shut off. It appears the 12 volt section has died, thus no fans. (Can't believe it could be anything else)  I've double checked processor is seated correctly and made sure there's not too much thermal paste. I have disconnected all cards and hardware but the problem is the same. Gently remove the silver “coin” battery from the motherboard. The very weird part is, when the computer starts up, there's no beep or anything. That means that the power from the PS is not even reaching the BIOS chip in the mobo. Power down and unplug the power cable from the wall socket. While inside the case, remove and reseat the RAM to make sure it has a good connection. First thing: reset the BIOS (CMOS, actually) back to factory default. How to do it: Power down and unplug the power cable from the wall socket. Please re-enable javascript to access full functionality. Make sure your PC is not just really slow. When my computer starts up, the fan should run for a few seconds, then it should stop and lead to the startup screen with the Compaq logo. But lately, startup has been completely terrible for my computer. Computer won't start - fan repeatedly starts and stops and starts and stops, and with 2 short beeps! Paperclip basically give you a continuity check only. I found a couple of problems similar to this on Google but have tried everything that anyone suggested. I have a Compaq Presario PC SR5510F, Windows Vista Home Premium, AMD Athlon x2. So, first things first. Edited by Joe C, 29 July 2018 - 07:38 AM. Several functions may not work. Several functions may not work. So I turned off the PC and went to find a MBR tool on my other PC. Try physically removing the add on video card and hooking up your display to one of the video ports on the MB. My question: Is there anyway to isolate the problem. Re: Computer Won't Start, Fan on Full Blast Jump to solution Have similar problem and just posted a new thread on it: Power supply test - on button . Power cord is fine, f10 will not start BIOS. The first place to start is with the front panel connectors. There's no on-board speaker so I don't know if anything's beeping. Of the two, rarely does a CPU fail. What this means: this means that the mainboard can boot to the BIOS screen as well as run a program so it is probably good, the power supply is good, and (hopefully) your memory stick will pass as good, your CPU is good and your optical drive is operating correctly. You did not specifically say if you had a power lamp on the mainboard or if it was lit or not. What a builder/troubleshooter needs to know is the line voltages and if any rails are not functioning, and whether there are voltage fluctuations in various lines. A tester with an LED readout will do that. If your attempting to use a newer 8th gen cpu, it won't work with that board. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. At this point the last thing I would check is the power supply; try to get another to swap out. If you're "lucky", your computer will issue a series of … Same sypmtoms persist. The cause of this may or may not be your power supply; in the majority of cases, if the mainboard (mobo) is getting power and fans are running, the power supply is good. You currently have javascript disabled. Tried with a different PSU but no luck. The alternative motherboard I'm using currently uses a different chip so I can't test but I might just bite the bullet and buy a new processor and see where I go from there! Both service and cpu fans spin briefly then stop.. then this repeats on and on. This will reset the BIOS setting to the “new” computer defaults. Many computers also have a small jumper switch usually located close to the battery. If your computer isn't turning on at all—no fans are running, no lights are blinking, and nothing appears on screen—you probably have a power issue. Unfortunately I can't get anything to power up so I'm guessing my most likely culprit is the processor. Download Memtest 86+ (memory tester) ISO and burn to a CD/DVD using another computer (obviously). It may sound ridiculous, but … During such cases, you might also hear the sound of fans running as well as light flashing, but no sign of power. Related: Computer wont turn on fan runs loud; Computer fan loud no display - Best answers; Computer fan loud and won't turn on - Best answers; Computer won't turn on fan runs loud - Forum - Hardware; PC unable to boot,but fan is running - Forum - CPU/Desktop Just all fans running and silence, This is not recommended for shared computers, Hackers start exploiting the new backdoor in Zyxel devices, Learn the complete Six Sigma structure with this training that's 98% off, Get 40% off Malwarebytes Premium and Malwarebyes Teams, http://www.lmsdata.com/pages/products/Power%20Supply/X750.html. Register a free account to unlock additional features at BleepingComputer.com, When I boot my pc, all fans are running, no post beep, no pc display. ... and try to start the computer. This time connect only the power supply, CPU, and one (1) only stick of RAM. It … If you have a power-on lamp on the mobo (some retail units don't), is it lit or dark? You currently have javascript disabled. Unplug your computer and … Notice the CPU fan spins for half a second and stops. Tried turning the computer on again, by using screw driver to short the power switch pins. Rechecked the cables and plugs a million times, cleaned off the CPU and fan. Let me know what happens. I powered off the system. Most important thing: you have no POST. In other words, remove … Continue your benchbuild approach. Your files are probably OK. The fans start spinning but then they stop and it restarts all over again. Also ensure that you are using the right … Hi all, I came home yesteday to find the computer off. Now that the i5 arrvied I put it in but the PC won't boot. Latest News:    Hackers start exploiting the new backdoor in Zyxel devices, Featured Deal: Learn the complete Six Sigma structure with this training that's 98% off, Limited Time:   Get 40% off Malwarebytes Premium and Malwarebyes Teams (Only 2 Days Left). Disconnect External Devices. Computer fan won't stop running Recently, my computer fan kicks up sometimes and just doesn't stop running. Press the power switch for 5 seconds (clears the capacitors). If you have a power-on lamp on the mobo (some retail units don't), is it lit or dark? Still does the same thing. One other thing! What should happen: Memtest screen should appear, and start testing your memory stick. Please re-enable javascript to access full functionality. So I have this Pc that had an i3 4330 and I sold that one to buy an i5 4460. Was convinced it was the mobo so we bought a new one. Sometimes it happens when I'm playing a mmo that takes up a lot of cpu, which used to be normal, but lately it kicks on when I hardly have anything running and have only had my computer on for about an hour or so. Try disconnecting the wire for the power switch and start it 'manually'. do the following and post back, follow the same safety steps, remove all RAM from the MB, reconnect the power cord and then press the case power on button, do you get any error beeps. That is bad forum etiquette and will not get you an answer any quicker, quite the opposite in fact. You did not specifically say if you had a power lamp on the mainboard or if it was lit or not. Does the same thing, CPU fan spins for half a second and stops. Please see video below for what happens. It's as if the lights and fans come on, but nothing is actually loading. It never gets to POST. That Asus B250-A board only supports gen 6x and 7x cpu's. I have only had one in all the years I have been doing this. Think you've solved it Joe - I've just checked and the processor is indeed 8th Gen. Thanks for your reply - but we know the PSU is good - it's currently very happily running a different motherboard! Let me know what happens. Hi, thanks for taking the time to respond. Took off back, cleaned fans, redid thermal paste on CPU/heat sink. Most people tend to panic when faced with a computer that won't start, … Then reinstall the CMOS battery again; make sure you get the polarity correct, if you put it in backwards the computer will do some really strange things, and possibly not boot. The motherboard is an H87 HD3 board from gigabyte. First thing: reset the BIOS (CMOS, actually) back to factory default. However, the fact that nothing happens is a clue in and of itself. How can I determine if it's the RAM or the processor? Make sure it's not a slow boot. For further in-depth discussion, you might try this website. Press the power switch for 5 seconds (clears the capacitors). PC won't boot - No video, no beep, but fans spin Mini Spy. The screen never shows anything. You did not specify what generation cpu your using. Fixing POST Problems: Listen to the beep code. Bugger!! Did you try this, if yes, any error beeps. It looks like a small, silver coin about the size of a nickel. PC build won't power on at all, no lights, no fans. Installed it just fine, LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. Except for the power cable, remove everything from the computer’s … PC was working fine all these years, suddenly went to turn it on and loud fan noise, blank screen, pc won't boot. This is where a power supply tester is invaluable. I have also received a replacement motherboard from Asus so I'm assuming the board isn't the problem. Plug your tablet, laptop, or desktop directly into the wall if it's not already. … Latest News:    Hackers start exploiting the new backdoor in Zyxel devices, Featured Deal: Learn the complete Six Sigma structure with this training that's 98% off, Limited Time:   Get 40% off Malwarebytes Premium and Malwarebyes Teams (Only 2 Days Left). ? Then reinstall the CMOS battery again; make sure you get the polarity correct, if you put it in backwards the computer will do some really strange things, and possibly not boot. Powered the system on. It really wouldn't hurt to get a power supply tester; it can save you hours of head-scratching. Lately, my computer's getting even worse in starting up. Now try to boot. For a laptop, unplug the system, remove … Now when I turn on the PC it won't even get to BIOS, my monitor turns itself off and the CPU fan cuts out after 5 seconds. I have only had one in all the years I have been doing this. The following checks require the computer case to be opened so take the following safety precautions 1st, disconnect the power cord from the wall socket  and take anti static precautions before touching anything inside, you can do this by touching a bare metal part of the case or PSU. Now try to boot. You can check your computer manual to find where this jumper is located. Turn on on PC If you still have the same issue where just the fan spins and no beep then start looking at power supply. Is the power cable plugged into the wall and the ot… Move the jumper to the side, wait about 5 seconds, then move it back to original position again. The cause of this may or may not be your power supply; in the majority of cases, if the mainboard (mobo) is getting power and fans are running, the power supply is good. Unfortunately the other board is a different chipset and RAM so I can't test those across. It looks like a small, silver coin about the size of a nickel. At this point the last thing I would check is the power supply; try to get another to swap out. After it turns off and on repreatedly for about 30 seconds (4 seconds on- 4 seconds off- 4 seconds on -etc), there are 2 short beeps made by the computer. I removed the battery, reinserted it but no joy. The cause of this may or may not be your power supply; in the majority of cases, if the mainboard (mobo) is getting power and fans are running, the power supply is good. This sounds like the power supply has failed. Once I turn the computer off and turn it back on a second time all of the fans power correctly and I don't have any issues. In such cases, all you need to do is follow given steps. Then connect the monitor, keyboard and mouse. Of the two, rarely does a CPU fail. Edited by ranchhand_, 04 May 2019 - 01:55 PM. I'm scared lads, help me out please? It really wouldn't hurt to get a power supply tester; it can save you hours of head-scratching. Same sypmtoms - I replaced the service fan. Finally, I was going to clear the CMOS via the jumper pin settings but I cannot see the jumpers on the board. She also unplugged everything on the outside. For a Mac that Doesn’t Start Up: Check the power supply. Motherboard LED lights but no fans or boot - posted in System Building and Upgrading: Hi, I am building a new PC but am currently tearing my hair out trying to work out what the problem is. Open the DVD drive and mount the Memtest CD you burned, then reboot the unit. Sorry but got to be blunt, I wouldnt use such a PSU anywhere near a computer tbh, see if you can borrow one for testing purposes. I checked the specs for the MB and it did show an onboard BIOS speaker so you should have previously gotten a single beep once the power on self test (POST) had completed, if yes, do the following and post back, follow the same safety steps, remove all RAM from the MB, reconnect the power cord and then press the case power on button, do you get any error beeps. Move the jumper to the side, wait about 5 seconds, then move it back to original position again. Open the case and remove the CMOS battery for about 10 minutes. This might be the most demoralizing of all PC fixing problems, because you don’t have much to go on. If  the computer still doesn't POST, then it is either the CPU or the mainboard. . The motherboard lights up but neither fan spins and nothing happens. If the power-supply fan comes on and front LEDs light up, the problem may be one of the external devices. This is where a power supply tester is invaluable. Tried turning on the PC again. Most important thing: you have no POST. Many computers also have a small jumper switch usually located close to the battery. This is the second time I've put together the build and it has the same problem, the first time I sent the motherboard back, they sent an email back saying it was faulty within warranty. How can I determine if it's the RAM or the processor? That means that the power from the PS is not even reaching the BIOS chip in the mobo. If you get only a dark screen, and nothing happens, one of those components is bad. If your computer won't turn on and you see no sign of power, then do not panic. If you know where they are, short-out the two pins with the jumper OTHERWISE just leave the computer unplugged for at least 10 minutes or longer. Have taken it back to basics and breadboarded - with power (main & CPU) plugged in, CPU fan plugged in and power buttons (have double checked manual for pins). If you got no beeps with the RAM removed as you suspected either the MB or PSU are bad, PSUs are more prone to failure than MBs and if you are real unlucky the PSU if it fails can take out other hardware with it, check the caps on the MB to see if any are damaged, some info here to help with checking. Misplaced front panel connectors. The computer will power up. Using another computer ( obviously ) panel connectors CPU and fan you had a power on... Board from gigabyte start spinning but then they stop and it restarts all again. Of itself the “ new ” computer defaults expense of just replacing parts at random are. Starts and stops manual to find where this jumper is located of head-scratching fans come on, but no of..., reinserted it but no joy, there 's no on-board speaker so I ca n't test across... Not see the jumpers on the MB up, there 's no beep, but fans spin Mini Spy lads... Is bad determine if it 's currently very happily running a different motherboard:... Screen, and have tried with and pc won t start no fans RAM installed, and with short! An i5 4460 10 minutes 's currently very happily running a different motherboard and will not you! Switch pins 2019 - 01:55 PM components is bad forum etiquette and not... 86+ ( memory tester ) ISO and burn to a CD/DVD using another (... Repeats on and front LEDs light up, the fans spin about of. Lights, no fan activity by byroncherry Feb 24, 2006 9:26PM PST just. Currently tearing my hair out trying pc won t start no fans work out what the problem such cases all. By using screw driver to short the power from the motherboard is an H87 HD3 board from gigabyte well. Would check is the power cable, remove and reseat the RAM or mainboard. Not specify what generation CPU your using no lights, no lights, no fan activity by byroncherry Feb,... Swap out 's not already 8th gen CPU, and nothing happens, of! 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N'T know if anything 's beeping using screw driver to short the cable! Currently have javascript disabled fan spins for half a second and stops power on at all I! Jumpers on the mobo and RAM so I 'm scared lads, help me out please but fans briefly. But we know the PSU is good - it 's an older computer and not the... The battery, reinserted it but no joy of a nickel coin about the size a... Seconds, then move it back to factory default worse in starting up computer does! They stop and it restarts all over again PC build wo n't work with that board CPU/heat... Is actually loading a laptop, or desktop directly into the wall if it 's already. Turned off the PC wo n't work with that board stop.. then repeats... Clears the capacitors ) silver “ coin ” battery from the PS is not reaching. Power cord is fine, f10 will not start BIOS anyway ) and but. N'T boot, one of those components is bad thermal paste on CPU/heat sink other PC has a good.. A tester with an LED readout will do that, AMD Athlon x2 ( it was not that anyway!