Just picked up a very nice Hyperdrive for cheap. Said it didn't power up but once inside I found the power plug pull away from the power supply. Fixed that and it powers on. Upon powering on, the steering yoke locks to the right and I don't get a picture. Looking at the PCB, I get a single red LED that glows. I tried reseating chips and connections. On two occasions, I did get it to boot twice, but after a 30 seconds the game goes back blank and the steering yoke locks right. I tried reseating again, but nothing so not sure if that was the issue. I still need to check for PCB voltage. I have no experience on these, so looking for some advice. Thanks
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Picked up Midway’s Hyperdrive…Need Some Help
- Thread starter Samelak
- Start date
mecha
Well-known member
yeah check voltage. it's probably like 5.9V lol
as far as I know Seattle and later stuff the CPUs run off 3.3V, I think juicing it might make the CPU lose its mind. this is also speculation on my part.
as far as I know Seattle and later stuff the CPUs run off 3.3V, I think juicing it might make the CPU lose its mind. this is also speculation on my part.
mecha
Well-known member
oh yeah sounds like failing under load. if it's original Peter Chou it needs to be replaced anyway. hard to believe that game is almost 25 years old already.
OP
OP
Samelak
Well-known member
Well I believe I found the culprit. Previous owner had bare credit wires grounding against the coin door. You can see the tips of the wire glowing. Pulled it away and got my voltage back and started to work. Unfortunately its playing blind now. While I was trying to figure out the booting issue, the monitor was powering on and you can hear the high frequency. Plus I had an image previously (twice). Now the monitor isn't powering on. I am getting 120vac to the monitor, but no neck glow and do not hear high frequency. I'm thinking I might have stressed out the monitor chassis with all of the power cycling I was doing trying to figure out the first problem. I could only find a single fuse next to the power input on the chassis...had 1 ohm resistance but not open.
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mecha
Well-known member
if it's a K7500, there's very little that can blow the fuse on a SMPS monitor. more than likely the HOT popped, Q704 if I'm not mistaken. it'll be on the left side by board edge of middle heatsink. red probe on leg 1, black probe to legs 2 and 3. if you don't have junction drops both ways or reads obvious shorted, it's bad.
then you need Paul Juray's help cause I have no interest in taking on monitor repairs.
then you need Paul Juray's help cause I have no interest in taking on monitor repairs.
mecha
Well-known member
oh, I didn't know it was a deluxe lol. U3000 then right? square neckboard with the squiggly neckboard transistors? has a separate power supply. beyond that I don't know how to fix those.
