Android Rugby Pro

First off, the Android is a Samsung Rugby Pro (SGH-I547) running running v4.1.2, which I presume is Jellybean? Anyways, the version isn't my real question, the real questions are is the hardware failing and the phone dying a slow death, and if so, am I looking at a new phone in the near future?

The symptoms are as follows:

-screen flashes (1/4 second?) a 'dusty' shade of orange often, with or without apps running, often on a random basis

-apps such as youtube, gmail, firefox, and even idle with task manager are making the phone quite toasty and the CPU says something like 40-50 and it's cut off in the task manager. this happens randomly, on a good day only 3-5 times, bad day, every time an app is opened.

-the battery feels hot, even though I have a brand new replacement.

-the phone turns on and off roughly the same time as my backup phone (which had no cameras physically installed to the board)

-the RAM runs perfectly fine, usually at around 300mb-400mb. it is never full because I have very few apps on my phone.

-RAM does spike up to max when the CPU is also at max. phone still seems to operate without input lag after the app is closed or restarted.

-phone has been dropped about 5' at 20mph when falling off my bicycle on way to college.

-highly doubtful, but the electromagnetic fields from welding MAY have done something? (still doubt it)

-charging from about 10-15% battery to 100% or near 100% only takes 30-45 minutes. OEM charger, not sure if this is normal or not.

Those are the reasons I'm suspecting some kind of hardware is at fault.

The only page is the home page, when trying to view other home pages, it just rocks back and forth. That is on purpose as I only have these apps up and about.
Weather (takes up the top half of screen), gmail, backgammon, youtube, messaging, alarm clock plus, camera, my files, and memo. On the bottom part of the screen there is contacts, firefox, and apps. In the apps, everything is completely hidden.

I've disabled some services, and think myself to be a little tech savvy, however please inform me if any of the disabled apps would be causing this.

Disabled Stuffs: all of AT&T's garbage, any app not on the list above has been disabled, even calculator, calendar, themes, animated backgrounds, stuff like that. I've googled before disabling and made sure it was 'safe' to disable.

GPS, bluetooth, driving mode, sync, and airplane are all turned off, the rest is turned on.

So far, no issues with the phone until this started up about a few months ago.

Am I looking at a new phone in the near future or is this something I can fix? If the phone does need to be replaced, what are some durable phones, similar to the Rugby Pro? (preferably similar specs, I dont use it to do very much)

Thank you very much to anyone stopping by who took time to read all of this essay...