Bally 5500 Blazing & problem

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bigslope:
Hi Guys, My 5500 battery went low (No surprise). I soldered a new one in and put the board in the machine with Jumper 10 covered to do a ram clear.
The machine powered up but nothing in the display area. No Error codes or anything. It would not ram clear.
I took jumper 10 off and tried to fire the machine up but again lights come on but nobodies home.

It rejects all coins etc. I did however notice the red reset light flashes slowly, about once every 3 seconds or so.

Anyone any ideas?

It was working fine prior to the low battery and I know how to reset it as I have done it quite a few times now.

proten:
Try the reset again

SafeRAM™ Clear Procedure
For a Complete, Full, or Partial SafeRAM™ Clear,
turn the machine power OFF. Unlock and remove the MPU
Assembly. Put jumper J10 in clear position.
Upon ensuring that the MPU Assembly is firmly seated
into the Backplane Board, turn the machine power ON
while depressing the appropriate buttons.

Complete - Press and hold the PSEUDO COIN and
TEST buttons, then switch power ON. When the message
CH C displays in WIN PAID, release the PSEUDO COIN and
TEST buttons. The CH C message is followed by CL C.

Full - Press and hold the PSEUDO COIN button, then
switch power ON. When the message CH F appears in
WIN PAID, release the PSEUDO COIN button. The CH F
message is followed by CL F.

bigslope:
Thanks for the reply but no joy

I did both procedures but still just the flashing reset light.

I did try the board from my other Bally 5500 and it worked.

Hope I have not ruined a CPU board  :37-

proten:
Is there any acid leakage on the board?
You can try gently removing the chips and reinserting them.

bigslope:
No acid damage on the board. Will take a good look at it later and try another battery to see what happens.

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