Losing Video

[Gary]

Hi,

I'm just putting together a new PC and I'm coming across something of a
problem.

When I power the system up, having turned on the main PSU at the back of the
PC, I get the startup information, listing memory etc. but after a few
seconds the video signal goes and the monitor pops up "no RGB Signal
Available" or similar. If I just press the power button on the front of the
PC off/on a video signal is never seen again by the monitor, but if I power
the PC off at the PSU on then back on again I get video for a couple of
seconds and then it disappears and the PC powers itself down. This scenario
just repeats.

The hardware I have is an Athlon 2800+, Gigabyte GA-7NNXP motherboard, 1Gb
OCZ EL Memory and a Hercules Radeon 9800 128Mb board. I get a number of
beeps but I'm unsure as to how many as it comes out distorted.

Any help would be apprecited.

Thanks

Gary

 

[Serial # 19781010]

Hate to be the send a messege with the obvious but...
1. does the 9800 video card work well in another computer?
2. can you put another video card in your 2800xp system and insure the
agp port is not bad.

If you have the manual for the motherboard and radeon video card, you
may wanna check to see if there is anything you need to disable in the
bios. The 9800 card i have popped right in with no problems. but I
also have a nvidea 5200fx that I have to shut a whole list of stuff
off in the bios (video shadowing etc...) When you figure it out, post
the result, i'm interested.

 

[Serial # 19781010]

of course as i sent this I remembered that I had to adjust the power
required to the video card on a 9700 radeon card once, can't remember
what the default setting was or what I had to change it to off the top
of my head, if hardware wise it all checks out, you may need to do a
little research and see if the wattafge needs manipulating.

 

[Gary]

I've tried another known working card from another PC and the same thing
happens, that card is a just a Geforce2.

The PC now exhbits no video signal at all and just powers up, then after
30secs or so powers itself down..

Gary

 

[Strontium]

Might need to replace the monitor cable. Or (worst case scenario), the
monitor. But, also, rereading your initial post it might also be that you
are not seating the card(s) firmly enough. Both things will cause what you
are describing. Check out both of those things. Quite obviously, checking
the seating of the card will be the first thing to try.

-
Gary stood up at show-n-tell, in [email protected], and
said:

 

[Conor]

Hi,

I'm just putting together a new PC and I'm coming across something of a
problem.

When I power the system up, having turned on the main PSU at the back of the
PC, I get the startup information, listing memory etc. but after a few
seconds the video signal goes and the monitor pops up "no RGB Signal
Available" or similar. If I just press the power button on the front of the
PC off/on a video signal is never seen again by the monitor, but if I power
the PC off at the PSU on then back on again I get video for a couple of
seconds and then it disappears and the PC powers itself down. This scenario
just repeats.

The hardware I have is an Athlon 2800+, Gigabyte GA-7NNXP motherboard, 1Gb
OCZ EL Memory and a Hercules Radeon 9800 128Mb board. I get a number of
beeps but I'm unsure as to how many as it comes out distorted.

300W PSU?

--
________________________
Conor Turton
(e-mail address removed)
ICQ:31909763
________________________

 

[Gary]

480W PSU

It's strange but another PC that was previosuly working, now shuts down
after a few seconds after booting also?

I've not been near this one!!

 

[JAD]

XP? and it shuts down after it reaches the desktop? or before? this is not that damn blaster thing is it?

If not, try loading cmos defaults or short the jumper and reset.

 

[Gary]

I've not got to the point of even attaching the hard drives yet, currently
have Motherboard, Memory, CPU/Fan and graphics card installed. Now I never
get a video signal, no beeps from the system it just sits there. The
graphics card is fine, as I swapped it out for a known working one, and
still the same!!

The other PC that was working, powers down even before getting to
Windows...sort of what I'd expect if the motherboard thought the fan wasn'r
going, but it is!!

Frustrated!!

Gary

XP? and it shuts down after it reaches the desktop? or before? this is

not that damn blaster thing is it?

 

[JAD]

did you clear the cmos?

I've not got to the point of even attaching the hard drives yet, currently
have Motherboard, Memory, CPU/Fan and graphics card installed. Now I never
get a video signal, no beeps from the system it just sits there. The
graphics card is fine, as I swapped it out for a known working one, and
still the same!!

The other PC that was working, powers down even before getting to
Windows...sort of what I'd expect if the motherboard thought the fan wasn'r
going, but it is!!

Frustrated!!

Gary


not that damn blaster thing is it?

 

[Gary]

Just reset the cmos and the PC that use to work has gone back into windows,
however, when I look at Asus Probe the CPU temperature is hovering around
the 80 degrees C mark, higher than I recall it use to be? Is that a
reasonable temperature for the CPU? Seems a little too high to me.

Gary

 

[JAD]

too high -what are you going by bios ?

Just reset the cmos and the PC that use to work has gone back into windows,
however, when I look at Asus Probe the CPU temperature is hovering around
the 80 degrees C mark, higher than I recall it use to be? Is that a
reasonable temperature for the CPU? Seems a little too high to me.

Gary

 

[Bob M]

Just reset the cmos and the PC that use to work has gone back into windows,
however, when I look at Asus Probe the CPU temperature is hovering around
the 80 degrees C mark, higher than I recall it use to be? Is that a
reasonable temperature for the CPU? Seems a little too high to me.

Gary

Way too high. I just had the same problem with my roomates computer.
I ended up reseating the CPU and cleaning off all the old thermal paste
and reapplying new paste and heatsink. Computer boots up everytine now.
Good luck.

Bob

 

[Gary]

The PC has an Asus motherboard, which came with a Windows application called
Asus Probe, that reports the temp to be 77 degrees C, I expected it to be
between 50 and 60. Just checked in the bios and that reports roughly the
same temp. maybe a cople of degrees lower.

Do you think this could just be poor cooling, I'm using a Zalman Copper
lower heasink.

 

[JAD]

yes Gary way too high as Bob said....I think you may have installed the heat sink improperly, this will cause symptoms like your
having.

 

[Gary]

Just removed the heatsink, cleaned the bottom and reseated with a thin film
of artic silver 3, the temperature has now gone down to 48/50 degrees!!!

JAD thanks for all the responses. Much appreciated.

Just need to sort out the dead mobo in the new PC and I'm sorted

yes Gary way too high as Bob said....I think you may have installed the

heat sink improperly, this will cause symptoms like your