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PC not starting. Absolutely dead !

tarun2687
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Hi,

Below are the specs of my desktop:

AMD Ryzen 5 3600 

MSI B450M PRO-VDH PLUS 

Corsair Vengeance 16gb ddr4 

Galax Geforce RTX 2060S 8 GB DDR6 

Corsair TX650M PSU

Samsung Evo 850 480GB 

WD Blue 2TB

 

1. As per today afternoon, my PC was running fine with no issues at all. I was playing games with no issue. Then i decided to uninstall my Kaspersky antivirus as i was having trouble with some banking websites. After uninstalling, the process asked me to restart the windows.

 

2. During restart, PC showed no display, chassis fans were spinning, and chassis HDD LED was not glowing. I decided to force restart the PC as it was not showing any progress. I waited almost 10 mins. I forced pc to restart by pressing reset switch but nothing happened. same state. Then i pressed power switch for 10 secs. nothing happened. Then I powered off the pc using PSU back switch. But after i pressed chassis power switch, pc did not start at all. no lights, no fans, no chassis led, no display, nothing.

 

3. then i removed GPU and tried to start the PC. No luck. Then removed RAM modules one by one and tried to start the PC. again no luck.

 

4. Then i removed all the power connectors of fans and HDDs from PSU. kept only 8-pin CPU and 24-pin connectors. But again same issue. Tested PSU with paper pin test by shorting Pin 3-4 with paper clip. It was working. PSU fan was spinning.

 

5. Then i removed CMOS battery for 2 mins then reinserted it. Then pressed power switch button for 10 secs with out PSU connected. No luck again. Shorted CMOS jumper but no luck. Done this with reset switch removed as well. but no luck again.

 

6. Then I removed power switch connector from motherboard and then shorted power pins to bypass power switch. But no luck. Checked voltage on power pins. it was 3.4 volts.

 

7. I don't have any spare motherboard or CPU to test. so i am not able to confirm if it is motherboard or CPU. But in case it is CPU then motherboard should at-least try to post or give EZ debug LED for CPU. but there is no action of any kind.

 

Can anyone suggest me what to do next??

 

Thanks in advance.

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45 minutes ago, tarun2687 said:

 

 

7. I don't have any spare motherboard or CPU to test. so i am not able to confirm if it is motherboard or CPU. But in case it is CPU then motherboard should at-least try to post or give EZ debug LED for CPU. but there is no action of any kind.

 

So you get no post screen, can't access the BIOS and there are no debug lights on the MOBO?

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1 minute ago, tarun2687 said:

No. no bios. basically nothing happens when i press power switch. no lights, no fan, nothing. 

 

Okay so it's as if no power if getting the the PC, it's not turning on at all. Did you check all the cables especially the power button connector.

 

I know if sounds stupid but did you check that you switched the PSU switch back to the (I) position?

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3 minutes ago, Tomthehitman said:

 

Okay so it's as if no power if getting the the PC, it's not turning on at all. Did you check all the cables especially the power button connector.

 

I know if sounds stupid but did you check that you switched the PSU switch back to the (I) position?

yes i checked the PSU switch. Even i measured voltage on motherboard power pins. It is coming 3.4V. this means PSU is supplying power to the board. right?

should i check individual pins of the 24 pin connector?

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2 minutes ago, tarun2687 said:

yes i checked the PSU switch. Even i measured voltage on motherboard power pins. It is coming 3.4V. this means PSU is supplying power to the board. right?

 

If the board is getting power have you tried bridging the power pin on the board with a screwdriver to see if it powers on that way?

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Just now, Tomthehitman said:

 

If the board is getting power have you tried bridging the power pin on the board with a screwdriver to see if it powers on that way?

yes. tried that. with screw driver as well as with jumper wire. no post. no power. Should i check all the pins of 24 pin connector for voltage? i can post the results

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17 minutes ago, tarun2687 said:

yes. tried that. with screw driver as well as with jumper wire. no post. no power. Should i check all the pins of 24 pin connector for voltage? i can post the results

 

I would first just try checking all the cables, even the ones you didn't take out initially. Just making sure that they are all in correctly and haven't been knocked. Just check everything in the PC, even taking them out and putting it back in again.

 

I have had it before where my PC just wouldn't start, I had to basically redo all the cabling before it started up. Still no idea what cable or why but I had obviously knocked something.

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14 minutes ago, Tomthehitman said:

 

I would first just try checking all the cables, even the ones you didn't take out initially. Just making sure that they are all in correctly and haven't been knocked. Just check everything in the PC, even taking them out and putting it back in again.

 

I have had it before where my PC just wouldn't start, I had to basically redo all the cabling before it started up. Still no idea what cable or why but I had obviously knocked something.

ok. i will check every cable which is connected to motherboard. just now I measured voltages on 24-pin connector. all voltages seems to be fine as per corsair connector diagram. +12V, +5V, +3V all are coming.

 

Also i installed my old gpu which is gtx 960 strix. it has and LED indication for the PCIe power connector. when i turn on the PSU switch, that LED indication also lights up confirming that gpu is recieving the power from PSU. but still dead silence on motherboard and cpu. 

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23 minutes ago, tarun2687 said:

ok. i will check every cable which is connected to motherboard. just now I measured voltages on 24-pin connector. all voltages seems to be fine as per corsair connector diagram. +12V, +5V, +3V all are coming.

 

Also i installed my old gpu which is gtx 960 strix. it has and LED indication for the PCIe power connector. when i turn on the PSU switch, that LED indication also lights up confirming that gpu is recieving the power from PSU. but still dead silence on motherboard and cpu. 

 

Okay let us know how it goes.

 

If you have checked and the power supply is working it's strange that it's not starting with shorting the power pins,as even if you had a problem with the CPU it should show a debug LED.

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15 minutes ago, Tomthehitman said:

 

Okay let us know how it goes.

 

If you have checked and the power supply is working it's strange that it's not starting with shorting the power pins,as even if you had a problem with the CPU it should show a debug LED.

yes. even i am also thinking the same. i don't know but i guess my motherboard is the culprit.

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8 minutes ago, tarun2687 said:

Hi, I was just about to reply. No luck. checked all the cables, checked motherboard for any visible damage or burnt marks. everything seems to be fine. now i am out of ideas.

Ah, my next suggestion would be to take it out the case and reassemble on the motherboard box or something, just to make sure that nothing is shorting and stopping it from powering on. Maybe just try with one stick of RAM to start with.

 

I don't think from what you have said that you would of damaged anything by turning it off at the PSU. (It would just be the same as a power cut) I mean maybe it can corrupt the hard drive but that shouldn't effect the ability to be able to post.

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Just now, Tomthehitman said:

Ah, my next suggestion would be to take it out the case and reassemble on the motherboard box or something, just to make sure that nothing is shorting and stopping it from powering on. Maybe just try with one stick of RAM to start with.

 

I don't think from what you have said that you would of damaged anything by turning it off at the PSU. (It would just be the same as a power cut) I mean maybe it can corrupt the hard drive but that shouldn't effect the ability to be able to post.

Sure i will try that. i will report back.

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On 7/27/2020 at 10:30 PM, Tomthehitman said:

 

Any update did you manage to get it to boot?

Hi, sorry for the late reply. I did board testing outside the case with only 1 ram module and with no ram module. Still same issue.

 

Then i decided to give my board to MSI service center. I raised RMA on Monday. And today I got my repaired board. Now the system is running fine.

 

I asked the service center guy about the details of the problem but he does not have any info. But they have updated my bios to the latest and there was no soldering marks on the board. I still dont know what went wrong. Anyways i had to re-install my windows and all the apps again as 'inaccessible boot device error' was coming.

 

 

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On 7/30/2020 at 4:50 PM, tarun2687 said:

Hi, sorry for the late reply. I did board testing outside the case with only 1 ram module and with no ram module. Still same issue.

 

Then i decided to give my board to MSI service center. I raised RMA on Monday. And today I got my repaired board. Now the system is running fine.

 

I asked the service center guy about the details of the problem but he does not have any info. But they have updated my bios to the latest and there was no soldering marks on the board. I still dont know what went wrong. Anyways i had to re-install my windows and all the apps again as 'inaccessible boot device error' was coming.

 

 

 

Ah well I am glad it's working fine! Who knows what the issue was if even MSI don't know but hey all's well that ends well.

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