Graphics card won't work?

July 30, 2010 at 11:49:37
Specs: Windows XP
Hey guys,

my video card went out, and i went to best buy and bought a new "Galaxy GeForce GT240 1GB" and I put it in and it doesnt seem to want to put anything on the screen.

my MOBO: Gigabyte GA-8I915G Pro

Thanks, James

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July 30, 2010 at 11:57:47
Having no video on a computer doesn't necessarily indicate there's anything wrong with the video adapter - it's much more common that something else is wrong.

Did you unplug the computer, or switch off the AC power to the computer, at ALL times when you were unplugging and plugging in the graphics card, or fiddling with any other connection or component inside the case ?
If you didn't, you may have damaged the video slot circuits, or the new video card, or something else.

You could try another monitor, or try your monitor with another computer, but there's probably nothing wrong with the one you're using.

Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:

If you can borrow a working PS from another working computer, try hooking that up.

If it is failing, you can usually replace it with any decent standard sized standard ATX PS with the same capacity or greater.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo PS.
See response 3 in this:

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

In this case, a GeForce GT240 chipset requires your system have a PS with at least a minimum 300 watt capacity.

If you're a gamer...
In most if not all cases, the max capacity rating of the PS is an intermittent rating. It's recommended that you do not load your PS to any more that 80% of that rating if you are going to be using something that puts a constant load on it, such as playing a recent game for hours on end. In that case, you multiply the min capacity stated for the system with the particular video chipset on the card by 1.25 to find the min. capacity of the PS you should get.

Installing ram that is not compatible with using it in your computer can cause no video - the mboard will not boot properly, and it may not even beep.

A poor connection of the ram in it's slot(s) can cause no boot and/ or no video.

See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:

For a laptop, or netbook, you must remove both its main battery and AC adapter before you do that.

For a brand name computer, see the Owner's or User's manual if you need to - how to remove or replace the ram is usually in that - it may already be in your installed programs. If you can't get into Windows, it may be on a disk that came with the computer, or you can go online and look at it or download it - it's in the downloads for your specific model.

For a generic desktop computer, see the mboard manual if you need to - how to remove or replace the ram is usually in that.

Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:

What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:

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July 30, 2010 at 12:22:07
thanks for the info, something i just realized. The power supply is not strong enough... 210watt and it requires a 300watt.

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July 31, 2010 at 07:52:03
If you're likely to play sophisticated games for hours, the minimum recommended is a 375 watt capacity for that video chipset.
If you want to be able to install any graphics card in the future, get one with at least a 650 watt capacity.

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