Question: iMac Screen goes black (ODD temp sensor faulty?)
I have an old iMac 2390 (intel, unibody, 8-ish years old) my dad upgraded from and I'm trying to turn it into a computer for my mom, but the screen goes black after a minute or so and I have to restart it to get it to work again--but just for a few minutes. Apple support told him to buy a new mac or spend $1400 on a new display and gpu, so he got a new mac. I'm trying to fix this myself and I've taken it apart twice; once to clean out the dust, and again because a fan was running too loud. And it actually did work when the fan was running fast. I think this is because I didn't plug the ODD temp sensor in properly the first time. I'm wondering, could a faulty sensor for the ODD be causing the mac to turn the screen off? Has anyone else experienced this? Is there a way to disable the sensor via command line or software preferences or do I need a new one? Also where could I get one?
Sorry, long question. I'm a PC guy and not used to the hardware of apple computers, so I need a little help. I don't know how to dig far into the software either. Thanks for reading this, and thanks if you have any advice.
iMac, iMac 2390