1040STE Not booting

[Lee Is Clueless]

Hello All,
Having a little issue with my 1040 STE with it not booting and staying on a blank white screen, after knocking into it recently.

I have checked to see if anything is out of place and or needs reseating, bought a diagnostic cart (nothing) and bought new TOS chips and adjusted the jumpers to suit... Still nothing.

Bar removing, cleaning and reseating (waiting on contact cleaner) i have no idea what has or could of happened.

open to ideas and suggestions

Lee

[stephen_usher]

Probably one of the custom chips (probably MMU) needs to be reseated.

[frank.lukas]

STE Combo chip GLUE/MMU/maybe Blitter is soldered on the Mainboard ...

[Lee Is Clueless]

Will give them a look and see if i can see anything out of the ordinary.

[Dlfrsilver]

Hello All,
Having a little issue with my 1040 STE with it not booting and staying on a blank white screen, after knocking into it recently.

I have checked to see if anything is out of place and or needs reseating, bought a diagnostic cart (nothing) and bought new TOS chips and adjusted the jumpers to suit... Still nothing.

Bar removing, cleaning and reseating (waiting on contact cleaner) i have no idea what has or could of happened.

open to ideas and suggestions

Lee

The 68000 is stuck in the reset loop. The capacitor(s) that are in the reset zone of the motherboard are dead, not doing anymore their job.

This problem cannot be inspected and checked with the ST diag cart. There are no options allowing this.

Replace them there are 2 or 3 (correct me if i'm wrong on the amount), and then check again the reset behaviour Lee.

Look here, Exxos has posted some informations regarding the STE reset problem : viewtopic.php?f=17&t=2175