Author: jsirex
Subject: ASRock X99 Extreme6 Unable to Power On Sometimes
Posted: 13 Sep 2016 at 4:57am
Shortly: After pressing "power on" nothing happens. Suspect software/UEFI bug.
Edited by jsirex - 23 hours 1 minutes ago at 5:02am
Subject: ASRock X99 Extreme6 Unable to Power On Sometimes
Posted: 13 Sep 2016 at 4:57am
Shortly: After pressing "power on" nothing happens. Suspect software/UEFI bug.
Context: I bought computer 2 years ago with the following configuration:
- CPU - Intel Core i7-5930k
- Matherboard - ASRock X99 Extreme6
- RAM - DDR-4 DIMM 32Gb KIT 4*8Gb"}" data-sheets-userformat="{"2":25473,"3":{"1":0},"10":2,"11":0,"12":0,"16":10,"17":1}">Crucial Ballistix Sport < BLS4C8G4D240FSA > DDR-4 DIMM 32Gb KIT 4*8Gb
- DDR-4 DIMM 32Gb KIT 4*8Gb"}" data-sheets-userformat="{"2":25473,"3":{"1":0},"10":2,"11":0,"12":0,"16":10,"17":1}">GPU - MSI V317 GTX 980 GAMING 4G
- PSU - Seasonic 1250W (SS-1250XM) X-1250 Gold Modular
- SSD - SSD Samsung 850 Pro 512GB (MZ-7KE512BW)
- UPS - APC Back-UPS ES 700VA (BE700G-RS)
- Tower - Thermaltake Core V71 Black (CA-1B6-00F1WN-00)
All that stuff worked as expected: no issues, no bugs, no BIOS/UEFI updates (because all works).
2 years of work - so I assume I had assembled it correctly, hadn't it?
Now it is very hard to power on computer (PSU turn on/off dance, clear cmos, etc).
Here is successful scenario:
- Computer is off
- I press power button
- I see lan led is on
- I see onboard power button led and reset button led are on (red light)
- I see Bios_A red led
- I see dr. Debug working
- PSU is on, lights on tower working
- Computer boots Successfully
- Using my OS (Debian 8 or Windows, doesn't matter) I shutdown computer
- It stops all that stuff
- Shutdowns HDDs, SDDs
- Turns off PSU
- Turns off onboard power button led and reset button led
- Turns off Bios_A led (there are two BIOSes)
- Done
Now the failed scenario:
- Computer is off (after successful shutdown)
- I press power button
- Nothing happens, no lights, no button led, no psu power on, no fans. All looks dead.
- But I see that LAN led working. That is.
- Pressing power button changes nothing
- Holding power button for 4-6 sec turns off LAN led. Pressing power button again - send us to step 3
- Trying to turn off PSU, wait 15-20 sec, clear cmos - sometimes it starts (1 of 10)
- Sometimes when I turn off PSU in that state it tries to turn on and immediately switches off.
- That "turn off/reset/turn on" dance after 10 or more tries finally turns on my computer.
Then there are 2 cases.
First one: computer turns on for few seconds, loads UEFI, pass post and then turns off (we now again in failed scenario)
Second one: it turns on and work as expected. Any number of reboots - all ok. System is stable, no BSOD, no kernel panics, etc. Only shutdown cause "failed scenario".
One last scenario - unfinished shutdown:
- Computer up and running
- I shutdown it or I go to UEFI, change any setting and press save (looks like this method uses something different instead of reboot)
- Fans turned off
- System halted
- Onboard Power Button Led stays ON
- Onboard Reset Button Led stays ON
- Onboard BIOS_A Led stays ON
- LAN Led stays ON
- Holding power button for 4-10 seconds doesn't turn off LAN led
- Now I'm in "failed scenario" again
Dr. Debug doesn't help (few times I saw code 79, but usually it turned off). I cleared CMOS many times.
What I did:
- Did a memory test - all ok
- Disconnected video card and other devices, tried start only motherboard+cpu+memory
- Tested PSU by connection PINS 4+5 (manual power on)
- Tried to switch to BIOS_B
- Tried to update bios to the latest
- Replaced battery (old one have about 3.0V, new one was 3.18V)
- Checked my assembly again (keeping in mind that it have worked for 2 years)
I also can check PSU output voltage, but I'm sure PSU is ok.
I don't know what to check next, how to debug boot process.
Any ideas, help are appreciated.
Edited by jsirex - 23 hours 1 minutes ago at 5:02am