BB1 dead

[Nepa Coin Op]

I have one here that’s showing no signs of life or booting ..... power sups good from another machine, all voltage leds lit ...... monitor is lit but nothing from board ..... could this be a bad bios chip I’m not even getting a bios beep...... can I copy or try a bios chip from another game or are they game spicific


Thanks

[bpracer]

I have one here that’s showing no signs of life or booting ..... power sups good from another machine, all voltage leds lit ...... monitor is lit but nothing from board ..... could this be a bad bios chip I’m not even getting a bios beep...... can I copy or try a bios chip from another game or are they game spicific


Thanks

Are all of the voltage indicators on the backplane green indicating good voltage?

[Nepa Coin Op]

Yep, I know ps is good I swapped it from a working game to make sure

[rickhunter]

Bios are the same, newest is 2000 older one is 1600.  No video on a bb1 is either monitor or mpu.  Have you tested the monitor to make sure it's good (hook up a laptop to it).  If you have another working game, test the cabinet with a good known working mpu.

[Nepa Coin Op]

Mon i would say is good when it first comes on the no signal message looks good, unless the power supply in the monitor craps out after a sec or 2, seems like its going to sleep from no signal..... ill dig deeper later, now thinking about it , very well could be mon psu

[Nepa Coin Op]

Mon good Psu good
I’ll try a bios chip next ... what sz chip is that ?
I’ll cook a spare


Thanks

[erbs]

M27C801