Mogul Freezing Constantly

[hilo4321]

This is been hashed and rehashed, I know, but I have searched for a LONG time on many forums, and on Google in general. I am dying here.

So, here's the deal. I have default Sprint ROM 3.56.651.0 (no sprint stuff, soft reset before all that garbage installed), and radio 3.42.02. The mogul started off working great (got it from my dad, got a new phone), and I was really happy with it. Then it started to do the "won't come back from sleep" thing, happening occasionally. Then it started happening more and more. Now it is just outright freezing CONSTANTLY. Now when I soft reset the device it only boots to the green windows screen and stops about 80% of the time. 15% of the time it doesn't even get to that screen. I think, now I'm not positive about this, but I think being plugged in helps it boot properly. At this point I don't know what to do.

Here is what I have tried/established that it is not the problem:

-not the program memory, I'm really anal about not having programs running that I don't want running (to save battery power)
-hard reset multiple times
-considered new roms, but am not sure if i want to go that route at the moment. I will however if people think that this will help to alleviate the problem
-probably everything google has to offer, but have forgotten.

Another point of interest, I manually replaced the screen before this started happening, but it was some time until the freezing began.

I am at my wits end, and I assure you I have been at this for hours before posting here. I will be eternally grateful if someone has any advice.

EDIT: ok, I'm going to go ahead and say that it works better when plugged in.. it boots much more regularly, however it still freezes when I'm trying to do something on it.