Monitor loses signal as certin times

[Krairo]

My problem is if I'm playing a game that uses 3d graphics my monitor will lose signal. But now I just noticed if I run adobe photoshop cs2 for about 20 mins it'll do it also. So what do you think my problem is?
Ok I have a emachines t2625 here are the specs and I have a ATI Radeon 9200 128MB AGP card in with a Maya 7.1 Sound Card. I've updated all my drivers and everything. I'm using Omega video drivers's also.

Processor

* Clock speed
* 2.13 GHz

* Processor type
* Athlon XP

* Processor manufacturer
* AMD

RAM

* RAM installed
* 512 MB

Video Output

* Graphics processor
* S3 ProSavage8

Display (Projector)

* Display type
* None

Optical Storage

* CD / DVD type
* DVD±RW

* CD / DVD read speed
* 12x

* CD / DVD write speed
* 4x

Storage Hard Drive

* Hard drive size
* 120 GB

Interface Provided

* Interface
* 6 USB USB, 1 Parallel Parallel, 1 Microphone Microphone, 2 Headphones Headphones, 1 Audio Audio, 1 Audio Audio, 1, 1

Storage Hard Drive (2nd)

* 2nd hard drive installed qty
* None

Optical Storage (2nd)

* 2nd optical storage type
* DVD-ROM

* Read speed
* 16x

Modem

* Modem
* 56 Kbps Fax / modem

Audio Output

* Audio output type
* Sound card

Cabinet (Chassis)

* Cabinet form factor
* Desktop

Networking

* Networking
* Network adapter

Dimensions & Weight

* Depth
* 6.0 in

* Height
* 14.1 in

* Width
* 7.3 in

Storage Floppy Drive

* Floppy drive type
* 3.5" 1.44 MB floppy

OS Provided

* OS provided
* Microsoft Windows XP Home Edition

Storage Removable

* Removable storage native capacity
* None

Slot Provided

* Slot provided
* 1 (1 free), 3 (2 free)

 

[KingCody]

you say it "loses signal"... by that do you mean the computer remains on and you can still use it but cant see anything?

the first and most obvious thing to check would be the monitor cable, make sure that it's clean and not lose. wiggle the cable around to see if it "loses signal" again.

do you have another monitor that you could try?

also, make sure that you aren't setting the games video settings higher than your video card and monitor can handle.

It sounds to me like your power supply may be going bad. emachines are known for their low-quality motherboards and power supplies. it could be either one, but my guess is the power supply.