[dinamm1968]

I have a gateway PC for the last three years and about a month ago my LCD monitor had no signal, I tried it with another PC and it works perfectly. I thought it was the video card so when I opened the PC I notice the motherboard has it integrated, my bro told me to install a PCI Express but still nothing so I also changed the CMOS battery and change the RAM but nothing. Can someone help me with this??

[Scleros]

The motherboard itself may be dead. Do fans and everything else power up?

Things to try:

• Pull the power cord and let it sit for awhile and then plug it back in and attempt boot.
• Unplug all the drives and adapter cards and attempt boot with a minimum hardware configuration.
• After three years, my prime suspects would be hard drive and power supply.

[dinamm1968]

Yes, I also forgot to mention the hard drive don't seem to be working either but the fans are. I think is not even trying to do the POST. I will try doing what you say and let see what happens.
Thanks!

[seahwk83]

As the machine is a couple of years old, see if you can try just a known working PCI video card to see if that would work. As mentioned if the video card works in another machine and just not yours I would suspect the mother board itself also