7750G-6645 Hot To Touch

The power button on that model sits right above the exhaust port for the heat sink cooling fan. All of the heat being pulled from the CPU is channeled down a pipe to a set of cooling fins that sit between the fan and the exhaust port so the fan can blow cool air across the fins and dissipate the heat. That's going to be the second or third hottest part of the laptop, as some of that heat is going to bleed through the case.

So, the fact that it gets hot doesn't necessarily mean anything is wrong with it. One thing you can do that will help is download HWMonitor (http/www.cpuid.com/softwares/hwmonitor.html) or similar temperature monitoring software and check to see what your system temps are when the power button is getting hot. Completely maxed out with a synthetic benchmark, the CPU temp will hit about 90C and the GPU around 80C. If your temps are anywhere near that during normal use (I would say anything over 75C), then they're too high. BUT there's a relatively simple fix.

There is a thermal paste that's applied between the integrated heat sinks on the CPU and GPU that help conduct the heat from the chips into the laptop's cooling system heatsink. If it's improperly applied (too much, too little, air bubbles, etc) or it's too old, then the chips heat up more than they should and cause temps for everything else to rise. It also causes the cooling fan to run more, longer, and faster than it should have to, which also makes the laptop louder. I've disassembled quite a few laptops and I've yet to see one with a proper paste job from the factory. Usually there's too much and very sloppily applied.

If you need to replace the paste (I would recommend it), it's a simple matter of ordering the paste from Amazon, Newegg, etc, removing the laptop backplate, removing the heatsink, cleaning off the old paste, applying the new stuff and reassembling. I typically see 10C drops in idle and load temps, if not more. If you get to this point, let me know and I'll give you a list of required materials, instructions, and links to several good tutorials on Youtube so you can see the process for yourself.