Problem after power outage

[danik56]

The system with GA-B85M-HD3 did not start after power outage.
Internal speaker makes some sort of ticking noise at constant slow frequency.
The fans are spinning and the power led is on.

I disconnected all HD & SSD drives and tried only with CPU and RAM but no change.

Now it gets interesting.
Took out the RAM, and powered up. I get endless beeps.
Put back the RAM, system now powers up just fine. no ticking or beeping.
Power off and restart and the ticking is back.
Power off, remove RAM and put it right back. system powers up fine.

Reconnected all HD & SSD drives, removed RAM and put it back.
System came up fine and works like a charm.
I can restart from windows and system still comes up fine.

If I shut down and system is powered off, it will not restart unless I remove the RAM and put it right back.

I tried with different RAM stick and still same behavior.

So is this a bad MB or what else could it be ?

 

[VirtualLarry]

That's very puzzling. It certainly sounds like a bad board.

You could try a "Clear CMOS".

You could also try relaxing the RAM timings, if you get it to boot with RAM installed.

The only thing I can figure is, when you remove the RAM and re-install it, it causes the mobo to boot with "failsafe" DRAM timings, and then the BIOS reads the SPD info, along with the system DRAM clock, picks out some timings for the RAM, and writes them to the CMOS for next boot. Only, on next boot, something about those timings is insufficient, and it won't boot.

It could be a dual-BIOS boot issue too. Maybe one of your BIOSes is corrupted, and won't boot, and when you pull the RAM and it doesn't boot, it registers a flag somewhere, and then when you put the RAM back in, it boots the alternate BIOS. In which case the solution would be to re-flash the BIOS, when you get it to boot with RAM installed.

 

[danik56]

The thing is that even if I pull out the RAM and put it right back and then re-boot it would come up fine.
I did try to re-load BIOS defaults but it made no difference.
I will try to re-flash the BIOS just in-case.

 

[danik56]

Re-flashing the BIOS fixed it. Thanks !!!

 

[Justinbaileyman]

Are you sure its fixed? It could be a bad capacitor on the motherboard linked to the Memory or could even be the psu? I know my PSU has a safety feature on it when there is a power outage that makes you have to switch off the PSU it self and unplug it then plug it back in and swith it back on before it will reset and allow you to power on your components.

 

[danik56]

All I know that before flashing the BIOS I couldn't re-boot after power off even after disconnecting the power cord and removing the RAM. Now it re-boots just fine without removing the RAM and without removing the power cord.

 

[denis280]

Best to do after power outage,don't start normally,start in safe mode.then shut down and restart

 

[kiriakos]

Bios got corrupted possibly due bad battery on that board.
Replace it as well.