I have a Gateway GT5220 I'm troubleshooting. It is, in fact, the machine I just gave my father for his birthday a couple months ago. (Prior to that, it was my home PC. My home PC is now the MacBook on which I'm writing this.)

Before going any further, I suspect that the answer will be, "It's worse than that, it's dead, Jim, it's dead, Jim, it's dead, Jim." At least, mobo and/or CPU.

The initial symptoms were as follows:

• Turn on power
• All fans fire up (thus making it so I can't hear if the hard drive is spinning or not, nor are my hands sensitive enough anymore to feel it)
• No LEDs remained lit on the front panel. (Initially, the hard drive indicator flashed briefly.)
• No beep, no video, no nothing.

Following some advice I found here, I tried to "drain the stored power." After following those steps, the new symptoms were:

• Turn on power
• All fans fire up
• The front panel LEDs remained lit!
• After about 20, maybe 30 seconds, we had video! Sort of. We got to the Gateway splash/POST screen, which appeared thoroughly corrupted. How corrupted? Well, I imagine it's what a POST screen would look like after reading the wrong passage out of the Necronomicon:

It stayed there. I gave it at least 5, maybe 6 minutes, and it didn't move. So I shut her down, started her up again, and now (this is where we currently stand, symptomatically) we have this:

• Turn on power
• All fans fire up
• The front panel LEDs remain lit
• No video, no beep, no nothing.

I'm a software guy; haven't done real hardware troubleshooting in years. My gut tells me that the mobo and/or CPU is fried, and unfortunately my gut didn't get to be as big as it is being wrong all the time. :( In addition to the link above, I have read all of the following (trying to save you some LMGTFY trouble):

• Gateway Support POST Error Messages and Handling
• About a zillion (useless) POST beep code sites
• A kioskea.net post indicating that most likely we're at what I consider "total loss" (mobo and/or CPU)

My questions:

1. Are there any conditions other than mobo/CPU that could cause symptoms like these?
2. Is it worth my time to try the next hardware troubleshooting step?
   (IE, remove all non-critical hardware from the machine, try to boot, systematically replace one by one until we find the failing component)
3. Which mobos will fit in the Gateway GT5220 case (with rear ports correctly aligned)?

(Why this is not a dupe: I wouldn't have posted this question if it hadn't been for the funkadelic possessed video display on the one occasion we got video out. I think that justified this not being an exact dupe. Of course, if the community overrules, I will understand.)