Plugged my working 4Mb STE into TV today and got continually 3 bombs and a slight buzzing noise on TV (might be unrelated). That means "Address Error".
I searched here and tried the following all with no change
1) Removed and reseated Ram
2) Removed Ram and tried 2 of 4 chips (various combos) in slots 1 & 3.
3) Removed reseated TOS roms
4) Only other socketted chips are : CPU & 1 other - Same mobo (exactly) as this thread pics - http://atari-forum.com/viewtopic.php?t=25450
I dont have correct IC removal tool so merely made sure they were firmly seated
5) Swapped FDD for known good FDD from STFM I have.
Any ideas, please?