Really digging into some projects this week.

Picked up a Black Hole at show last year nonworking. When powered on coils lock on and blows F4 fuse and sometimes if that dont blow the under main playfield fueses blows if left on.

I unplugged the driver board and coils still lock. Checked all 4 bridges in cabinet and the all measure fine. Took measures at fuses in cab and all measure 36 to 39 volts

Read pinwiki: recommends to use eraser on metal tabs for connectors. Then repin. This will take some time.

Couple questions. Best tool for the job to extract pins from both types of connectors. And best pins to buy for the repin. I am not familiar with these pins.

Anything else to check or trouble shoot before my tools and pins show up?

Thank you in advance

All coils. I checked individual boards under PF and they all test good. Unplugged all connections to driver and checked bottle cap transistors on board. All measure accurate.
Even with driver out of game coils lock and fuse blow.

I have unplugged all the self dedicated pop bumper boards under the PF. When I plug any one of them in they lock on. This happens when the Driver board is not plugged in.

Thank you for responding

I rebuilt one of the pop bumpers and same result.

Thank you

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Problem was on the mpu.
Made sure voltages on power board were good then poped in new MPU. Game plays with minor errors except NO SOUND.

Looking at pinwiki to trouble shoot. Any addition help would be much appreciated. Thank you!

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