GT 5228, GATEWAY

Try these people. They keep factory refurbished parts.

http://www.ambry.com/
Buy Computer Accessories Online Computer Parts Stores ambry com

It's a dead motherboard. I apologize. It's not worth fixing.

1. take out the memory
2. turn on again without memory (you should hear long beep sound) and turn it off again
   
3. clean memory using eraser (better if you have spare memory to replace it)
4. now try again
   
5. if not working, checks whether the work properly? and clean the fan from dust. and try to switch it on again.

I look forward to hearing further.

does it load the bios screen? Does it get to the windows load screens if it does go to the bios screen? Does the computer power on at all?

Sometimes what happens is the bios chip can be faulty or die and this will have to be replaced to fix the issue. If the computer is not powering on then it is more than likely a power supply issue.

(just in case, you might want to make sure that all of the adapters that come from the power supply are connected to the motherboard as well)

Check you bios configuration with Date and time correction.
See if your computer need cpu fan cleaning. Try to run F8 and scan your computer after you have accessed to safemode. Goodluck
JMC

First disconnect any external devices like printers etc that you might have plugged in.
If that doesn't work then it's a problem inside the box it can be the power supply ,motherboard ,memory ,CPU and others.
If the PC has warranty then you should take it back.
If you are comfortable in opening your computer then we could try more advanced troubleshooting ,let me know if you want to try it.

my 5228 was under warranty when the same problem occurred. the motherboard was replaced at least twice. six months later, I have the same problem but now am out of warranty. so try replacing the motherboard. am going to try it on my own only because I have so much info in that compter.

"Also after I try to turn it on after a couple of unsuccessful tries, it actually boots and the machine works fine". This maybe cause by the hardware problem. And it usually caused by the motherboard. Changing the motherboard unit may solve the problem. But make sure you've already done the basic test on all of your hardware before changing it with a new one.

I have the same model after youlet it sit for a long enough period to cool down it will come back on and work normal, it is a cooling problem called gateway and they confirmed this theproblem I ran in to was what fan this computer has 3. temp fix I used was to remove the tower cover to allow better air flow try this till you can figure out what fan is messing up

Remove and refit memory sticks, as you mention no beeps, so the memory may need re seating. From there it could be a processor or bios fault not starting up thr first 64KB of memory to boot windows