TrevEB
Member
My missile command appears to run perfectly fine until I switch it into test mode.
The test begins but then halts with a flashing screen and raspy tone indicating a
v blank error.
See Video
http://www.youtube.com/watch?v=oApIPJgT994
There are no visible signs of damage to the board. In fact the board is remarkably clean.
I've tried pressing on the corner socket chips with no effect.
The chips are very firmly in place and will tear the socket apart
if I attempt to remove them.
The voltages all test out perfect.
Is this problem indicative of an eventual failure during game play mode.
Is the problem isolated to the game board?
The schematics show references to vblank at
E6, H7, J6, L8, M9
I've only owned this machine for a few weeks.
I don't believe that it has ever passed the system test.
While I've owned it, I have replaced the caps,
rebuilt the trakball and replaced the bulb & starter.
Any suggestions on how to remedy the problem?
The test begins but then halts with a flashing screen and raspy tone indicating a
v blank error.
See Video
http://www.youtube.com/watch?v=oApIPJgT994
There are no visible signs of damage to the board. In fact the board is remarkably clean.
I've tried pressing on the corner socket chips with no effect.
The chips are very firmly in place and will tear the socket apart
if I attempt to remove them.
The voltages all test out perfect.
Is this problem indicative of an eventual failure during game play mode.
Is the problem isolated to the game board?
The schematics show references to vblank at
E6, H7, J6, L8, M9
I've only owned this machine for a few weeks.
I don't believe that it has ever passed the system test.
While I've owned it, I have replaced the caps,
rebuilt the trakball and replaced the bulb & starter.
Any suggestions on how to remedy the problem?
Last edited: