Black screen sometimes when POSTing

darael · 19 Jun 2017 at 22:11

Recently I've been having problems with my setup - I suspect it's the heat affecting the motherboard, but I'll explain more.

If I restart my PC sometimes I will get just a blank screen and don't see and POST screen and Windows doesn't load. If I turn the PC off for about 2-3 minutes using the button on the case, it usually comes back on and acts if nothing happened.

I've reseated my memory, PCI-E devices and power cables for the motherboard and graphic card - none of these helped, other than giving the PC a few minutes to settle or cool down.

The PC is perfectly stable in use - no errors, slow downs or blue screens. You'd never know anything was wrong until you restarted.

Does anybody have any pointers, or is this likely to be a motherboard issue? I don't think Asus or OcUK will exchange my 30 month old motherboard now.

My specs are:
Asus Z97 Pro Gamer (the latest BIOS, 2203, is installed and has been since it was released sometime last year)
Intel i5 4570S
GTX 660
Creative PCI-E Sound Blaster X-Fi Titanium
SuperFlower Golden Green HX 450w
Intel Gigabit GT PCI-E

zola25 · 20 Jun 2017 at 17:11

I'd be inclined to agree this sounds like a motherboard issue, although PSU is a slim possibility too. If you have fast boot enabled, try switching it off in the BIOS.

If your board does need to be RMA'd I believe Asus generally have a three year warranty.

laddy · 24 Jun 2017 at 09:52

m/board, memory, psu - choose one!

the post is eeking out settings and sometimes a glitch will stall it a bit! Also, flash the bios again - good luck

EsaT · 24 Jun 2017 at 11:06

Only available reviews of Golden Green HX-serie show cheap Chinese CapXon capacitors, which aren't known from tolerating heat so failing PSU definitely can't be excluded.

Guess also graphics card could somehow fail to initialize properly which could surely prevent getting picture and stall POST.
Problem happening only occasionally would make finding cause by swapping parts slow.

Have you tried stress testing PC?

F2kSel · 25 Jun 2017 at 19:12

I've just started getting the same issues, happened a few weeks back then twice today. No Bios and a short single beep every 25 seconds. I noticed four small lights inside 2 green and 2 yellow.
As it's intermittent I guess I just have to wait until something fails completely, the only thing I changed in the last few months was the GPU.

darael · 19 Jul 2017 at 18:09

Now my PC won't even boot up, not even into the BIOS. This build wasn't even two years old - ordered on 20/01/2015.

I've completely taken it apart, tried different RAM sticks, checking the CPU socket and re-applying the heatsink compound. Nothing is working.

darael · 19 Jul 2017 at 20:00

To add I have now also tried a new CMOS battery and another PSU - both of which gave me exactly the same result as before.

Looks like my motherboard has gone.

My new spec me thread is here: https://forums.overclockers.co.uk/threads/spec-me-a-new-build.18786851/

jbh110tdi · 19 Jul 2017 at 20:27

the motherboard not under warranty?
I know you say OCuk wont exchange a 30 month old motherboard but surely Asus should be able to help.
Personally I would be trying this option rather than building a fresh system.

darael · 19 Jul 2017 at 20:47

I'm not sure that the motherboard is under warranty. And after reading about what people have said about the Asus RMA procedure, it sounds like it could be a nightmare! I'm not sure I have the patience for that.

jbh110tdi · 19 Jul 2017 at 21:27

darael said:
I'm not sure that the motherboard is under warranty. And after reading about what people have said about the Asus RMA procedure, it sounds like it could be a nightmare! I'm not sure I have the patience for that.

My board has been back to Asus without any major problems but we dealt with Asus direct as I won it in a competition from them.

darael · 27 Jul 2017 at 16:05

Another minor update. I returned the motherboard to OcUK on Monday, they received it yesterday (DPD didn't pick up from shop until Tuesday) and tested it today. It seems that OcUK aren't having much luck with the board either, so at least it's not something I'm doing!

The product MB-635-AS on RMAxxxxxx has been sent back to manufacturer for repair or replacement. It will be returned to you as soon as we receive it.

Please note that turnaround times vary and Overclockers UK will endeavour to return the items in the speediest manner possible at the time.

If the manufacturer is unable to return the items within 28 days, we will give you the option of a refund. Depending on the age of the items, the refund may include a deduction for the length of time you have used them (known as rescission).

Further email confirmation will be sent when the item is returned to you.