Got an Amiga 1200 for repair, which didn’t boot. Only red screen on composite, on RGB nothing.
Owner said there was a problem with kickstart 3.1, but diagrom dropped garbage..
Output on composite:
Checked all data/addreslines from rom sockets, all where good and clocks are detected..
Did a reflow, on Alice, Budgie, cpu, chipram and paula. Only blackscreen.
Solderjoints on some legs of the budgie..
hmmm, maybe i did this, or there was too much solder somewhere.. didn’t touched the legs with the hotair gun.
ok.. fixed the solderjoints..
we have serial output from diagrom. 🙂
And we have a picture!! 🙂
But the board isn’t stable, so there are some more problems, so let’s find out what’s the problem..
Budgie, a bit buggy..
Did a wiggle test, and it failed.. 1 loose pin on budgie
Fixed it, and wiggle test passed.
3 pads are gone under LISA, I placed a new quality socket, and connected pads to right signals
It’s getting hot..
I also replaced XC9, was getting a bit hot.
- A reflow fixed the RED screen, but it caused another problem, a black screen.. no boot.. The reflow caused that excessive solder made some solderjoints..
- Board is working, but unstable. Problem one loose leg from the Budgie, and some bad pads under the LISA.
- Replaced XC9 because it got very very hot.