posting then not posting then working?!?

[Dayo1337]

My PC is working atm but i have no idea why?!?!?

 

Issue:

I had a PC (see PC spec 1) that was running fine for several months, then one night I shut it down all seemed fine nothing out of the ordinary happened. I go to boot the PC up the next morning and nothing, doesn't post I get nothing out of it. I just found this topic but i did run through all of the suggestions here, but no 12. so i put it down to a faulty motherboard, so i use this as an excuse to upgrade. Now after upgrading and having that PC working for a few weeks it has happened again but its a little weirder. I can reset cmos hold the power button down in a strange combination (down for 5 seconds leave for 30 then click it once) this will allow me to power on the MOBO where i get post code A2, this allows me to enter the bios where i enable the M2 drive. I save then exit and then it doesn't post again. Whilst I've been typing this it has randomly turned on and booted into bios, so i made the changes again, and again nothing. I went to get the old spec of my old PC and it randomly turns on again and boots into windows (after nothing for 5 minutes). Im not sure what is happening and would be nice to know what the issue is so i can prevent it from happening again.

 

PC spec 1 (old):

Mobo: MSI H97M-G43

Ram: 1x8GB corsair DDR3 1600, 2x4GB corsair DDR3 1600

M2 SSD: Samsung SM951 nVME 256GB*

SSD: 60GB kingston SSDow*

HDD: 2x2TB WD Green*

GPU: 2xGigabyte 7970 windforce in crossfire

CPU: Intel i5 4440

CPU cooler: Stock intel cooler

PSU: Seasonic X-Series 1050W*

Case: cheap nasty case, cant find the name anywhere 

 

PC spec 2 (new):

Mobo: EVGA Z170 FTW

Ram: 2x8GB corsair vengance DDR4 3200

M2 SSD: Samsung SM951 nVME 256GB*

SSD: 60GB kingston SSDow*

HDD: 2x2TB WD Green*

GPU: 1xEVGA 980ti FTW

CPU: Intel i7 6700k (not overclocked yet)

CPU cooler: Corsair H100iGTX 240mm AIO water cooler

PSU: Seasonic X-Series 1050W*

Case: Coolermaster 5 pro

 

* = same in both PCs

[HatsuneMilku]

3 minutes ago, Dayo1337 said:

My PC is working atm but i have no idea why?!?!?

 

Issue:

I had a PC (see PC spec 1) that was running fine for several months, then one night I shut it down all seemed fine nothing out of the ordinary happened. I go to boot the PC up the next morning and nothing, doesn't post I get nothing out of it. I just found this topic but i did run through all of the suggestions here, but no 12. so i put it down to a faulty motherboard, so i use this as an excuse to upgrade. Now after upgrading and having that PC working for a few weeks it has happened again but its a little weirder. I can reset cmos hold the power button down in a strange combination (down for 5 seconds leave for 30 then click it once) this will allow me to power on the MOBO where i get post code A2, this allows me to enter the bios where i enable the M2 drive. I save then exit and then it doesn't post again. Whilst I've been typing this it has randomly turned on and booted into bios, so i made the changes again, and again nothing. I went to get the old spec of my old PC and it randomly turns on again and boots into windows (after nothing for 5 minutes). Im not sure what is happening and would be nice to know what the issue is so i can prevent it from happening again.

 

PC spec 1 (old):

Mobo: MSI H97M-G43

Ram: 1x8GB corsair DDR3 1600, 2x4GB corsair DDR3 1600

M2 SSD: Samsung SM951 nVME 256GB*

SSD: 60GB kingston SSDow*

HDD: 2x2TB WD Green*

GPU: 2xGigabyte 7970 windforce in crossfire

CPU: Intel i5 4440

CPU cooler: Stock intel cooler

PSU: Seasonic X-Series 1050W*

Case: cheap nasty case, cant find the name anywhere 

 

PC spec 2 (new):

Mobo: EVGA Z170 FTW

Ram: 2x8GB corsair vengance DDR4 3200

M2 SSD: Samsung SM951 nVME 256GB*

SSD: 60GB kingston SSDow*

HDD: 2x2TB WD Green*

GPU: 1xEVGA 980ti FTW

CPU: Intel i7 6700k (not overclocked yet)

CPU cooler: Corsair H100iGTX 240mm AIO water cooler

PSU: Seasonic X-Series 1050W*

Case: Coolermaster 5 pro

Man this sort of stuff has happened to me before and the problem resided in the think I least expected. The power supply..... Yep, even my 80+ silverstone power supply failed. Give a different power supply a test and see if it has better stability.

[Dayo1337]

Yea that is what i was thinking, it is an old PSU that i got from a mate so is a few years old now

[fuddinator]

Dying PSUs do weird things. My seasonic g750 bit the dust very slowly. Rig worked for several monthes and then my secondary HDDs would disappear randomly. After playing musical HDDs I thought it was a motherboard. So i swapped in my wifes rig mobo (same one) and still no fix. Then after swapping back the computer wouldnt boot or anything. Hit the power and nothing. But I walk away for a day and computer would boot normal and run. Shut down and try powering on 5 min later and nothing. So I ship out the psu for RMA and no problems since.

[Dayo1337]

happened again, just ordered a new PSU so will try that out