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Terminator 2 cab freezes sometimes: heat?
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Cenobyte:
I recently bought a Terminator 2 cabinet and I'm having great fun with it!

The thing is 20 years old and does seem to have a few small problems:

1. the monitor seems to have color problems: in the upper left corner, the color is way off. It's a rather big part of the screen that gradually goes to a blueish color (the green letters are actually blue there). Not a big thing and when playing the game you hardly notice it, but I was wondering if it could be solved? Or is the only solution installing a new monitor?

2. (and this is a bigger problem) the game freezes somethimes with the screen going black, speakers making small popping sounds every now and then and the system sometimes also resets and goes to the scrambled screen that you see when you startup the machine. The machine does not reboot, you'll need to shut it off and on again. It sometimes does this during a game (which is a bummer) but also during attract mode. I pulled out the CPU board and had the cab running for about an hour without the problem returning until I pushed the CPU board back into the cab: after 15 minutes the cab froze again. Could this be a heat problem? Might installing an extra fan directed at the CPU board solve this? Or is it the result of a malfunction somewhere?
DaOld Man:
I would put a floor fan (the kind that plugs in the wall and maybe rotates back and forth), positioned to blow right  on the cpu board with the back panel open, just to see if this helps. If it does then you might want to look farther down the heating up path. If it doesnt help, its probably something else.
(Maybe power supply over heating?)
jennifer:

       Cap kits are cheap, most likely fix your monitor. As for the "heat" thing, a burnt connector, [bad ground] on board edge would be my first look.
look at it, wiggle it a little, check all connections. Thermal [heat] problems can be tricky to find.... freeze spray works but this should be your last
resort,  and use sparingly
Nephasth:
I don't know where the speakers are located on a T2, but an unsheilded speaker near the monitor can cause the type of discoloration you are describing.
Xiaou2:
Arcade Monitors, when moved, often need to be de-magnatized.  There is a special tool for this very purpose.   PC and newer arcade monitors have the feature built into them.
(dont use a standard magnet, as I believe that can do permanent damages)

As for the freezing, most freezes come from power supply issues.  If the current is too low or too high, it will cause such issues.  The Power supply is also likely to be the thing overheating/failing, possibly due to a failing component, and or possibly clogged with dust.

 Check all voltages, blow out dust when cab is unplugged and cool, check for capacitors that are bulging (raised cap tops usually mean the caps are almost dead, and are not able to operate properly). Also look for soot/burn marks.

 The older arcade PCBs are pretty damn durable.  Heat is rarely an issue for them.  It was only when they got into the hard drive erra, and PC based equipment that heat really started to play a role in machine instability.  The older PCBs were often ran non-stop for days, in high heat situations at the factories before being installed / shipped out.
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