A new PS2!
Come down to Disc Replay, we sell them for $39.99 and all systems are guaranteed for 14 days! Act now and you'll get a free handie behind the store
Slimline lid switches:
Slimlines have two switches that must be held closed in order for the unit to try to read discs. Therefore, if you run the unit with the lid removed, you’ll need to hold the two switches down. One is located on the small board onto which the power switch is mounted and the other one is located on the main board to the left of the rear part of the disc drive (traverse assembly).
Got that from here: http://forums.gamewinners.com/forums/sh ... p?t=513070
It's a pretty good guide for diagnosing your PS2... provided you have a fat one. The slimlines are a little more tricky to diagnose but it sounds like the lid switches aren't being tripped properly so maybe play around with them... they could just be stuck depending on the life that PS2 of yours has had, mister "I drop elbows on my systems". Also, are you sure the little spikes on the lid that actually trip the lid switches are intact? If not, easy fix. Just replace the lid if you can find one.
Actually, there are modified lids available that hold those lid switches down permanently for purposes of switching discs of other tomfoolery. Here is a link: http://www.ebay.com/itm/PLAYSTATION-2-P ... 439a26a3d7
I've seen a few with these lids and they seem sturdy if installed properly. I personally wouldn't trust them unless I experimented with them a little bit. Just an option but one I personally wouldn't take.