A little over 1 year ago I built my computer which was working perfectly until Saturday morning. On Saturday I returned to my desk to find the computer was frozen and the screen black. I figured that probably the computer went into 'sleep-mode' and attempted to re-wake the computer; however I could not get it to respond. After a while, I performed a cold-boot whereby the computer powered on but the screen remained black. The monitor power light remained amber, which I understand indicates that it is not receiving data. The hard drive indicator light went on for a couple of seconds and then stopped. All of the appropriate indicator lights were on and the fans were running, but the computer seemed to be 'stuck in place'. Unfortunately the computer did not provide any beep codes to provide a direction and with a dark-screen, I am unable to determine what could be going wrong.
The following is a summary of my existing configuration below:
- Motherboard - Intel Desktop Board DX38BT ATX - iX38 - LGA775 Socket
- CPU - Intel Core 2 Quad Q9450 Quad-Core Processor, 2.66 GHz, 12M L2 Cache, 1333MHz FSB
- CPU Cooling - Zalman CNPS9700LED Cooling Fan
- Memory - 4 x - Corsair XM3 DDR3 (CM3X1024, XMS3 - 1333)
- Power Supply - Corsair TX750W PSU
- Hard Drive - WD 500 GB SATA2
- Video Board - EVGA e-GeForce 9800 GX2 Video Card
- Audio Board- Asus Xonar D2 Audio Card
- AA - D85848-503
- OS - Windows 7
I completed the following steps to identify the problem:
- Swapped the monitor for known working monitor. The new monitor remained black with the power button staying amber (receiving no data).
- Removed non-essential hardware from the computer (Audio Board and TV tuner card).
- Reseated all internal components except the CPU. Checked all cabling and looked for shorts.
- Cleared the CMOS - Since I couldn't get access to the BIOS screen to reset, I reset the BIOS by removing the jumper on mother-board and restarted the machine. This did not resolve the issue. I have since replaced the BIOS configuration jumper back into the 'normal' position.
- Tested the power supply unit with a multi-meter. All power-supply lines were working and the voltages were well within tolerances.
- Replaced the video board with new video board.
- Purchased and installed (in the PCI bus connector 1 slot) a Power-On Self Test card. The Post card returns a code of 4C from a cold-boot. In reviewing the error code for the DX38BT motherboard, the Intel website says that all codes between 40 and 4F are 'Reserved for future use".
As you can see, I am running out of options here and I would appreciate any advice or insight that anyone could provide.
Thank you in advance for your help.