Hi guys, I hope this post is in the correct section.
So why won’t it boot up?
Custom built desktop Power Predator running Xp Home 32 SP3
Asus A8N-VM-CSM mobo
Integrated graphics with NVIDA GetForce 6150 and nForce 430 MCPchipsets
AMD 64x2 3880 CPU
500 Gb Sata hard drive
Ram 2 x 512 Mb DDR 400 PC3200
PSU Colors IT 400w
Samsung SH-S162L/BEBN 16x DVDRW
BENQ monitor with VGA and DVI ports
This computer has run like a dream for the last seven years, then about six months ago it started to hang occasionally, and I also noticed that the single beep it use to give on start-up had stopped beeping.
A couple of weeks ago I was running a full system scan with Avast virus check when it hung with the page showing all the details it was checking plus several small white zig zag lines. It wouldn’t shut down or restart so I had to pull the mains plug to shut down…… It wouldn’t re-start.
This is the present status: - When you press the power button on the front of the case the power-on light comes on and goes off, the green light on the front of the case comes on and stays on, the num lock on the keyboard flashes once, the CPU fan runs at normal speed, as does the PSU fan, The green LED on the CD ROM caddy flashes, and the caddy can be opened and closed. The green light on the mobo comes on, the hard drive runs; there is no beep from the mobo. The monitor remains totally blank.
The monitor has been checked on another computer (using the same video leads) and is ok. A new mains power lead has been tried. The PSU voltages have all been checked with a voltmeter and Multimeter and all show correct voltages within five % at the IDE socket with mains power on, including the “good for power” circuit. The CMOS RTC RAM data has been cleared; the CMOS battery has been removed and checked for the correct voltage. The RAM has been removed, cleaned and re-seated. Removing the RAM and powering up produces no beeps. All board connections have been re-seated. The power supply to the mobo is correct and the small green LED is on; no capacitors seem to be blown or leaking. The board has been removed and inspected for signs of burning or damage: All connections seem to be sound. The small speaker that gives the beeps has been checked and works ok, the continuity on all the leads from the front of the case to the system panel on the mobo is ok. The computer can be powered up by shorting out the reset pins on the mobo, but the result is the same as pressing the power-on button on the front of the case.
The only things I have found so far is that the thermal paste on the North Bridge and the CPU had dried out (now recoated)
The Ethernet light on the router doesn’t light up and the small LED lights on the RJ45 socket on the back of the computer don’t light up.
So why won’t it start?
I would be grateful for any help and suggestions.