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After experiencing what I thought was a video card (Redeon 9000) malfunction (multi-colored lines on display) everything returned to normal following a re-boot.
The next day the sustem does not boot up. USB devices (hub)and monitor do not work and there is no beep at start-up. The hard drive is working though as are all fans and a light is also visible on the motherboard (Gigabyte. The drive lights come on as well. I also cannot turn of the system with the power on button -must use the back of case power switch.
I am a self employed graphics designer without a computer... Any input would be greatly appreciated.
TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.The next day the sustem does not boot up.

I would suggest trying a couple of things. First, clear the CMOS while the sysem is unplugged from the wall, either by using the MBoard jumper or removing the battery for a few. Also, while inside the case, try reseating all the cards, memory, and cables. In the case of the memory, remove and replace 3 or 4 times to scrub off any possible oxidation and try installing ONLY one stick at a time to eliminate a bad module.

I'd also check the seating of the CPU - no beep but fans etc. working is a classic problem if the CPU's been displaced, though it was more common on older slot A systems.
"I know that I'm mad - I've always been mad..."

Thanks for the quick response & suggestions.
All cards including menmory were repositioned. All contacts checked. I even swapped the video card from another machine. Ram modules were rotated for a module check. The CPU is snug but I did not attempt to remove it. I did remove the CPU fan several weeks ago for a cleaning but everything worked fine until now. A DVD burner was also added at that time.
The system does boot up completely and the beep is there but the system seems to cut out (shut down) during or shortly following a boot up (irregular). Windows is launched but 2-5 minutes later the screen displays milti colored lines or jibberish and then the system shuts off by itself. (the power swithch can not turn the computer off during this colorful screen display)
Could there be a problem with the mBoard?
TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.
The next day the sustem does not boot up.

The heat sink was not removed, only the fan (screws) that sits on top of it.
TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.
The next day the sustem does not boot up.

Good point. Having had the screen freeze and display the colors last week I checked the CPU temp. and it was runnung at 60 C. (normal)
TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.
The next day the sustem does not boot up.

Try a different PSU, preferably a higher wattage one.
It's nice to be important but it's more important to be nice...

I have a 2 year old 400W PS. Could this have gone bad?
TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.
The next day the sustem does not boot up.

I suspect faulty PSU or overheating.
60C for a proccessor could be a high temp (depending on what proc you have)
Is the video-card fan working properly?? Clean it for dust and stuff.
It's nice to be important but it's more important to be nice...

Well I had a chance to get into the BIOS before the machine shut down. The CPU temp. was registering at 45C. System temp was at 30C.
The videao card has been cleaned out and I also replaced it with a spare but the problems persist.
TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.
The next day the sustem does not boot up.

The PSU is a ProKing-KYP400 ...(China).
Do the symptoms indicate a PSU failure?TB
After experiencing what I thought was a video card Redeon 9000 malfunction multi-colored lines on display everything returned to normal following a re-boot.
The next day the sustem does not boot up.

Your symptoms could be from PSU failure.
Replacing the PSU is easy to do. You can get one at Best Buy.

"(the power swithch can not turn the computer off during this colorful screen display)"
Did you know that you have to hold the power button in for about 5 seconds to power off? If you did that and it still didn't power off, that could indicate a motherboard problem.

I seem to be experiencing a similar problem. I also
have a Gigabyte motherboard. At first I thought I
had a software problem, and maybe it is/was, but
the results seem to be more serious than expected.I held the power button down for the 5 seconds or so
to shut it down. However, while it does power up, --
the fans run anyway, and I hear the HD working -- it
doesn't boot. Nothing to be seen on the monitor.Oddly enough, the DVD light remains on. I
disconnected the DVD from the system, but that
didn't accomplish anything that I could tell.I tried clearing the CMOS, but that didn't help either.
So at the moment I'm at a loss as to what to try next.
Sounds like swapping out the video card didn't help
Tom, but I may try that anyway.My system has been running fairly cool, and in fact I
just happened to be monitoring the heat with a
utility program I installed last week. My friends
recently put together similar systems, and they were
having heat related problems. My system was
running fairly cool, with the CPU around 30C.I wish the video card manufacturers would be as
good about advertising safe/recommended
temperature ratings for their cards as they are some
of the other features. My video card was running
hotter than the CPU, but it was still around 60C.I slowly removed components, saving the video card
for last for obvious reasons. Still no satisfying
"beep" to be heard indicating a proper start up. I
can't seem to get this thing to boot at all.The system is only a few months old too.
Thanks to those of you offering helpful suggestions
to Tom! I considered them as well. :)

After spending a good deal of time attempting to
track down the problem with my system, I
mirculously discovered the problem -- don't
overlook a prayer in need, it can help indeed. :pIt turned out that my obstructed view of the power
cable caused me to miss something critical. The
connection to the motherboard was loose. Once that
was properly secured everything worked much
better. Imagine that! ;)Well, I assume that was the problem and I didn't
knock the power cable loose as I was working on
removing components while I was testing. It is
amazing how long the computer had been running
with it like that. Once properly connected, the
system fired right up.Hopefully Tom found/finds a solution that was as
easy as that. :)

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