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jesesfbi
01-12-2015, 11:46 AM
Hey everyone,
I recently picked up a sega STV with black screen issues. So I did all the methods I found online, reflow the two SH2 chips and discharge all capacitors. I looked around for broken traces and didn't find any.

I still get a black screen, even if I hold SW1 in on start up nothing shoes.

Any suggestions on what I should look for?

Xian Xi
01-12-2015, 03:15 PM
If it's just black it means there isn't any clock signal, check the crystal for the system clock. If it's working it should at least display garbage.

kuze
01-12-2015, 03:54 PM
If it's just black it means there isn't any clock signal, check the crystal for the system clock. If it's working it should at least display garbage.

It will display black if the main SH2 is bad too.

jesesfbi
01-12-2015, 04:28 PM
If it's just black it means there isn't any clock signal, check the crystal for the system clock. If it's working it should at least display garbage.
I'll check the clock when I get home.


It will display black if the main SH2 is bad too.
So you're saying although I reflowed the solder that isn't the problem and I could have a bad SH2 instead???. Well time to replace them lol