Spy Hunter tech

Shavenyak

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My PS works, as does the game board. The game still won't boot up and I'm not getting 5.1 on the main board. The sockets all look fine. The LED light doesn't come on at all on the cheap squeak board. Would a bad cheap squeak cause the game to not boot up?
 
You said you're not getting 5.1VDC at the game board....What voltage are you getting? Without 5VDC, the motherboard will never boot.

Edward
 
You said you're not getting 5.1VDC at the game board....What voltage are you getting? Without 5VDC, the motherboard will never boot.

Edward

The board is getting something like 3 volts but both the PS and board were tested working in a friend's cab. Something is keeping the board from getting the 5 volts the PS is putting out. The sockets look to be in good shape with no corrosion.
 
If you are sure the boards and power supply are good- I would take a look at the fuses on the transformer assy, and check all the wiring and connectors. You can disconnect the Cheap Squeak, and the game will still boot.
-Mark
 
The board is getting something like 3 volts but both the PS and board were tested working in a friend's cab. Something is keeping the board from getting the 5 volts the PS is putting out. The sockets look to be in good shape with no corrosion.

Is the voltage 3VDC at the power supply?....if so, something's pulling it down (since you tested it in another game). If you have 5VDC at the power supply, but 3VDC at the motherboard.....you have issues in the wiring/harness/connectors.

Edward
 
You definitely need to find out what's causing that voltage drop. You've got no chance of the logic working at 3V and I'd be a bit worried that you're hurting something with a potential short on the board.

Personally, I'd disconnect the board and attach a 12V light bulb to the +5VDC and GND lines on the PSU so it has some load on it, then measure what voltage is being produced. It could be that the PSU is crapping out so when a load is applied it drops down to 3V, or it could be that the board has a partial short somewhere which could explain the 3V reading.

I'd also check the battery in your multimeter - a number of test meters I've encountered in the past decide to give screwy readings when the internal battery is going flat; no obvious symptoms bar getting duff readings.

Let me know what you measure when the board is disconnected and you've got a 12V bulb across +5 and GND. If you're not sure what bulb to use, a fruit machine or most car bulbs will suffice.

cheers
t
 
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