Twilight Zone horrific noise

eb94110

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I just moved about 600 miles, and I plugged in my Twilight Zone, and it is making this horrific, loud noise, and the DMD did not light. I checked the plugs and ribbon cables, thinking something may have gotten yanked, even though it was moved very gingerly. Everything looked ok, but when I plugged in the machine again, the noise still occurs, and the DMD only slightly lights up with a bunch of jagged lines. Any thoughts on what this might be or what I should do? The game was working fine before I left.

Thank you for your time.
 
You did the basics "checking cables" now try re-seating the cables.
If that doesn;t work then watch the led's on the CPU board as the system posts.

CPU Board LED Flash Codes, all revisions.
WPC-S and prior uses a "Dx" designation for its CPU LEDs. WPC-95 uses a "LED20x" designation.

D19/LED201 (blanking): at power-on should be ON for about 3 seconds (1 second on WPC-95), and then turn off and stay off. When D19/LED201 is on, the blanking circuit is disabled (and will not allow any coils to be energized).
D20/LED203 (diagnostic): After D19/LED201 turns off, D20/LED203 should stay flashing permanently while the game is turned on. This indicates the CPU is "running".
D21/LED202 (+5vdc): this LED should ALWAYS be on. It indicates the CPU has +5 volts DC power.
Problem Power-On CPU D20/LED203 (diagnostic) Flash Codes. If D20 does not flash continually, here are the flash codes diagnostics:
blinks ONE time: U6/G11 CPU game ROM bad
blinks TWO times: U8 CMOS RAM chip bad
blinks THREE times: U9 WPC custom chip bad (pre WPC-S), or G10 Security PIC chip bad (WPC-S and later)
 
Was it like a big buzz sound?

Check all your connectors on the boards. I'm sure one just slipped loose while moving the machine.
 
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