Laptop will shut off unexpectedly

Roughly one and a half years after I got my dual core computer it started shutting off randomly. Since this began it has been wiped twice and we've replaced the battery, charger, motherboard, and fans but within a week it always starts turning off every couple of days again. I've taken it in to office max who we bought it from and they didn't fix anything concrete before sending us over to Toshiba warranty. Toshiba then did the same thing, replacing one part at a time and then shipping it back insisting it was fixed (but it would shut down the moment I turned plugged it in and turned it on)
Finally they said if it wasn't fixed "this time" that it would be replaced for free. So we sent it in, they fixed nothing before sending it back, and we called to set up the replacement. They played games and insisted it needed to be sent in again to be sure. This was of course a load of garbage but my father who was on some heavy meds at the time agreed and sent it back in. This then happened for a 3rd time and they held onto the computer for the remainder of the warranty. Since I couldn't convince my father to follow up with some course of action my computer is still messed up but I have no means to get it fixed. I tried getting it repaired at Crystal pc but after wiping it (this was the 2nd time) and cleaning the inside they said it should work. It will stay on long enough for me to use it now but every few days it turns off and will turn off multiple times in the same 24 hour period. A man working at Crystal pc recommended changing the power setting to remove sleep mode (as I could prevent the shutdown usually by hitting the power button a few times) but now instead of switching to sleep mode in place of the shutdown it will just shut down.
I'm new to this forum but if the issue of getting the computer replaced is still available or anyone has technical advice either would be appreciated.

For anything warranty I would private message Peter the moderator with you model and serial number and any repair info, RMA numbers that you have because he is the only one here that can help with that kind of issue.
To send a private message click on the envelope at the top of the page then go to compose new message.
S70-ABT2N22 Windows 7 Pro & 8.1Pro, C55-A5180 Windows 8.1****Click on White “Kudos” STAR to say thanks!****

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