No Video on confirmed working monitor.

May 26, 2012 at 20:44:46
Specs: Windows XP
I have a media center pc. 510XL Recently it began to blue screen with a video driver error. I updated the driver. O.k. a day or 2. Then when I would start computer, (xp pro sp3) my screen would just remain blank. Green "on" lite would blink. Unplugged video cable and monitor displayed "cable is unplugged". Turned off pc and checked video card, reseated card. Turned on and all o.k. for 1 day. Then back to blank screen. Removed and replaced ram. Re start pc, all o.k. for 2 days. Then another blank screen (appears to post o.k. (1beep), blank screen. Remove video card and plug into on board video and all is well, monitor is working fine 1 week. So I bought a new video card (ATI agp).
Plug in new ATI card and blank screen again. Ughh! Remove new card and am back to onboard video which is useless for a media center pc. MB looks good. No puffy capacitors. CPU temp is 55. PC works perfect with video card out. HELP....thanks

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May 26, 2012 at 21:22:43
It would help to post the model/model number of the video cards you've tried. Do they require an additional power connection? The system is almost 10 yrs old & the PSU is only 250W. Has the PSU ever been upgraded?

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May 26, 2012 at 21:26:59
Old card ATI 9600, new card, ATI Radeon 9550 256 MB DDR2 Memory AGP 3. No addl power.

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May 27, 2012 at 06:20:44
Don't know if you saw my editted comments about the power supply? Also, if 55C is the CPU temp at idle, it's getting pretty warm. It's doubtful it's the cause of the problem, but it is an issue that should be addressed.

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May 27, 2012 at 06:26:16
that and i would stress on that power supply unit, althought they are old cards but still could be bad brand cheap psu. Plus the pc works fine with onboard it could be the agp slot itself

computers are a second home

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May 27, 2012 at 07:43:13
"Plus the pc works fine with onboard it could be the agp slot itself"

The Radeon 9550 and 9600 video cards draw about the same amount of power.
Some mboards that support only 4X / 8X AGP video will NOT produce video from the AGP card if the video chipset also supports 2X mode, but both of those video chipsets support 4X / 8X modes ONLY. (Some Radeon chipsets 9500 and lower DO also support 2X mode too.)

Are you SURE the 9550 card was working before you installed it ?
Both cards have a small fan that tends to slow down or stop spinning as time goes by. It the fan on the 9550 card wasn't spinning fast enough, or at all, at ANY time, the video chipset on it may be fried.

It's extremely rare for ram that worked fine previously in the same mboard to go "BAD".

ATX family mboards are always being supplied with DC power in some places including some of the contacts in the AGP slot even when the computer is NOT running as long as the PS is connected to the mboard and the PS is being supplied with live AC power.

If you didn't REMOVE the AC power to the computer case / power supply when you were unplugging / plugging in the video cards AT ALL TIMES, it's likely you have damaged the AGP slot's circuits and/or the circuits on the video card

If the AGP slot's circuits have been damaged, you will not get video from ANY working AGP video card. .

AGP cards and AGP slots are especiaslly easily damaged when you haven't removed the AC power to the PS because they have two rows of contacts that are staggered vertically.

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May 27, 2012 at 08:13:20
Since it all began with a driver blue screen, I removed all old catalyst control center and ati drivers. Reinstalled card. Turned on pc and found new hardware installed card and drivers. Working for now. Probably should have done that first?

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May 27, 2012 at 08:36:11
Software problems on the hard drive CANNOT cause no video on a mboard that has an AGP slot while booting the computer BEFORE the operating system loads - only hardware problems can cause that
If you always had video BEFORE Windows loaded, you should have said so !

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May 27, 2012 at 09:01:59
This has gone back and forth. Only 1 blue screen on drivers while running. After that there was no video on boot. I think I said that pretty clearly. Was able to get video only while agp card was removed, and plugged into onboard vga. Makes no sense to me either.

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May 27, 2012 at 13:03:31
We frequently have people who started a topic say they have no video, when they actually DO always have video BEFORE Windows loads. The mboard boots - loading a bootable operating system loads Windows - they're two different things.

You probably had a poor connection in the AGP slot when you weren't getting video from the 9550 card before. With the AC power to the case removed, re-seating the card, or better still, removing the card, wiping off it's contacts with a tissue or soft cloth, re-installing it, is sometimes required
In rare cases there's crap in the AGP slot that is causing the problem that must be blown out of it (don't use a vacuum cleaner).

"....I removed all old catalyst control center and ati drivers. Reinstalled card. Turned on pc and found new hardware installed card and drivers."

Usually you DO NOT have Windows install drivers for a video adapter when Found New Hardware pops up - you're supposed to Cancel that , and install the software using the proper installation program, on the CD or DVD that came with the card, or by using an installation file download you got from the manufacturer's web site.

However in this case XP, at least XP with SP3 updates, probably already has Microsoft supplied drivers / associated software for the Radeom 9600 and 9550 video chipsets (that doesn't include Catalyst) .
Look in Device Manager. If Display adapters shows only one listing for it, if the card has more than one video port and you want to be able to connect more than one computer monitor to it, you probably must install the ATI / AMD suppled software. Microsoft .Net Framework 2.0 must be installed in Windows in order to support the Catalyst software - if that has been installed it's listed in Add or Remove Programs in Control Panel
Or in any case, if you want to use the features of the Catalyst software, you must install the ATI / AMD supplied software.

If the 9550 adapter IS using Microsoft supplied software (see the Driver info for it in Device Manager, if you want to install the ATI / AMD supplied software
- have ATI / AMD download already on the computer
- go to Device Manager - Display adapter - RIGHT click on the 9550's entry, select Un-install
- DO NOT Restart the computer when prompted to do so
- Install the ATI / AMD download - you may get one or more error message, but the installation of the software should complete
- Restart the computer - the ATI / AMD supplied software should work fine, and there will probably be two entries for the card in Device Manager - Display adapters.

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