While working on Windows 10, my desktop computer suddenly rebooted itself and stops to display a POST screen. Computer was running on low profile and has never been overclocked.
Computer specifications are:
- MB: ASUS Rampage IV Extreme
- CPU: Intel i7 3930k 3.2GHz
- RAM: Vengeance LP 1600MHz 16gb
- GPU: 2x NVIDIA GTX580 1.5gb in SLI MODE
PSU: Tagan BZ 1100Wreplaced by a new ANTEC EDG750 (80 PLUS Gold) 750W
Debug LED stuck at 79 - which means corresponding to manual CSM Initialization and the VGA_LED boot indicator is RED.
The only reasonable problem could be, after having installed Ubuntu 14.03 LTS on separate SSD while other data HDD and SSD(win10) remained unplugged.
Then, I've plugged back HDDs and SSD (win10). Since then, each time I turned ON my PC from Standby mode with FASTBOOT mode ENABLED, under WIN10 OS, it reboot itself at the random moments.
The last reboot was caused exactly in the same way, but only no more POST or BIOS screen.
What I remarked is, that my keyboard Logitech G510 is not lighting up at all, while before this problem, it was lighten immediately once I started a PC.
Here is a VIDEO
Tested different hardware combinations
I tried to boot only with SSD(WIN10), then SSD UBUNTU, then without any... Tried also without GPU, with one GPU, with another one, swaped the GPUs, tried different PCI slots. Tried one RAM stick, swaped with another... Nothing helped.
Even using ASUS ROG USB BIOS Flashback did not helped.
It flashed the bios to the most recent version but, the problem remains.
Same for flashing to the very first BIOS version, and back to the version at the moment it was bought (January 2012).
DEBUG ERROR CODE 5A
While booting and before it stuck at error 79, it shows for a half-second an error 5A which means *Internal CPU error"... any idea what is related between this type of error and "VGA_LED RED" ?
After taking it from an PC EXPERT and leaving him without testing it if it's powering ON or not, I went home with a new PSU, to test it out, and stated that motherboard does not react at all.
Now, the motherboard won't power up, no LED lights are ON, nothing, like there is no power. Connected a brand new Power Supply 750W but the problem still remains.
Contacted ASUS Support Center and having conversation (very slow communication btw), will stay tuned.
CPU i7 3930K died by provoking an error to boot within a Debug Error 79 on the motherboard ASUS RAMPAGE IV EXTREME. After badly indicated error number 79 which means the CSM Initiliazition error I gave my whole PC to an Expert. Day after, he said that the problem was in PSU. Before taking my computer from the expert, I forgot to test it and went directly to store to buy a new PSU. Bought a new 750W PSU, came home, get the things connected, and no POWER, nor the new PSU, nor the old one.
Bought a new Motherboard for 400eu, same error 79 - faulty CPU caused the error. Now, motherboard died either from CPU or was killed by the pc repair shop guy.
Thank you all for your comments.