amiga 500 plus (dead?)

[zipper]

Give still a wiggle/push to every socketed chip. And look at the Agnus socket if it's not cracked; you could gently scrape the Agnus contacts to be sure that they pass the voltage thru. I had a 500 that gave green screen because of defective Agnus contact.

[zipper]

SN74LS244N - LOGIC, BUFF/DVR TRI-ST OCTAL driver chip.

[zipper]

You need a multimeter to check the traces. My A4000 clock stopped to work due to minor battery leak. The traces didn't look too bad - but a multimeter told that one was broken; easy fix with a jumper wire.