Author: LancerSubject: X99 WS - Power On and POST Fail
Posted: 31 Dec 2017 at 2:41pm
In January 2016, I built two new PCs with identical parts, using Asrock X99 WS motherboards. Running almost every day for two years now, PC#1 works perfectly; never any problem. PC#2 has had an occasional power on problem after a full power off, shown by no response when pushing the power on button. When that happens, I shut off the power supply and disconnect the power cord, then wait a while before reconnecting power and then PC#2 will start and run normally.
Now, that does not work. Now I have to leave PC#2 unplugged a long time before the power button will power on. Then during POST the process stops with a debug error code b2 (or 62), and a red LED by BIOS_A. After a while the code changes to 99 for a moment, then the motherboard will beep once, and the debug lights will go dark, and the computer just sits there running, doing nothing. All the while, the monitor display remains black in power save state. Meanwhile, PC#1 with exactly the same components and configuration, runs perfectly. No changes have been made to PC#2 hardware or configuration recently, so it's a mystery as to why this power on and POST problem is happening now.
One thing I tried was to clear CMOS using the button in the I/O area (after power cord and all cables unplugged). After doing that, then power on, the POST stopped again at b2 (or 62), then after a bit changed to 99 and held there for a while, then the display came on and the system went into Setup. I compared all PC#2 settings to settings on PC#1 and made one setting change (boot beep on), then Save and Exit. PC#2 shut off, with the motherboard reset and power buttons lighted red, along with the red LED by BIOS_A.
When I pushed the power button to start back up, no response, the computer did not start. After turning off the power supply and unplugging power, the motherboard power/reset/BIOS_A LED lights went off within a minute. After letting the thing sit for a while unplugged, and then reconnecting power, the PC started on push of the power button, but the routine was same as before. POST stopped at b2 (or 62). After a while the code changed to 99 for a moment, then the motherboard beeped once, and the debug lights went dark, and the computer just sits there running, doing nothing. Pushing the Reset button replays this routine.
Any ideas as to what may be causing this behavior, and how to fix it? I need this computer working for next week, so I hope to get it operational this weekend. All advice is greatly appreciated. Thank you!
Motherboard: ASRock X99 WS
CPU: Intel Xeon E5-1650v3
Memory: Crucial CT4G4RFS8213 (ECC DDR4 2133, 4 x 4GB)
Graphics: AMD Radeon HD 7990 (MiniDisplayport 1.2 connections) (in x16 PCIE1)
RAID Controller: LSI MegaRAID SAS 9361-8i, with CacheVault (in x8 PCIE6)
SSD: Samsung 850 Pro (2 in RAID 1) (Boot)
HDD: Western Digital RE - WD2000FYYZ (2 in RAID 1) (Storage)
M.2 Drive: Samsung MZHPV256HDGL (Image)
ODD #1: LG WH16NS40
ODD #2: Pioneer BDR-2209
Serial Port Add-On: StarTech PLATE9M2P16
Removable SATA Drive Enclosure: CRU DataExpress DX115 (no drive)
IDE Controller Card: StarTech PEX2IDE (no drive) (in x4 PCIE5)
PSU: Seasonic Snow Silent-1050
OS: Windows 10 (64 bit)
Display: Dell U2715H (four)
