Midway 4-Player 25" Dedicated Video Game - Manual (Page 113)

Troubleshooting 6-11
Video Troubleshooting Table, continued
•
Picture is too narrow Maladjusted WIDTH
pot
Enter Monitor Tests Menu. Watch Crosshatch
Screen while adjusting WIDTH pot for best
picture. You’ll find this pot on Monitor Remote
Control Board, behind coin door.
• Picture is too short Maladjusted HEIGHT
pot or damaged
vertical circuit
1. Enter Monitor Tests Menu. Watch Crosshatch
Screen while adjusting HEIGHT pot for best
picture. You’ll find this pot on Monitor Remote
Control Board, behind coin door.
2. If pot has no effect, service vertical output circuit.
• Picture seems shifted to one
side Maladjusted
HORIZONTAL
POSITION pot
Enter Monitor Tests Menu. Watch Crosshatch
Screen while adjusting HORIZONTAL POSITION
pot for best picture. You’ll find this pot on Monitor
Remote Control Board, behind coin door.
•
Keystone-shaped picture Shorted turns in yoke
1. Substitute working yoke.
2. Have service bureau converge monitor.
3. Retest
monitor.
Software Update Troubleshooting Table
SYMPTOM CAUSE REQUIRED ACTION
You skipped steps or
performed them out
of sequence. Return update components to kit, reinstall
original parts in cabinet, and try process again.
• Update didn’t work
• After update procedure,
screen reports lower than
latest version Installation error may
have damaged
device. 1. Inspect for bent or broken pins.
2. If you have another kit, try it.
3. Ask your distributor to check your upgrade ROM.
Mismatched boot
ROM update version
and hard drive. Boot ROM and disk version numbers must
match. If necessary, replace boot ROM or disk.
You installed boot
ROM in wrong
socket.
1. Be certain that boot ROM device resides in
proper socket.
2. If necessary, move boot ROM to proper location.
You installed upgrade
ROM in wrong
socket.
1. Install disk ROM. Only use upgrade socket for
hard disk drive updates.
2. Load ROM contents onto drive.
3. Remove ROM from game.
•
No Attract Mode screens
•
Board indicators illuminate,
but screen is completely
blank
Upgrade ROM
remains in VGM
(video game
machine) during
game play.
1. During game play, upgrade ROM must be
empty. Switch off VGM.
2. Remove upgrade ROM.
3. Switch on VGM.
4. Retest Game Mode.
NOTICE: Someday, software updates for your VGM (video game machine) might
become available. These upgrades may improve your VGM’s performance or add new
VGM features. Such upgrades tend to appear sometime after factory first releases
VGM. Contact your distributor for information about updates.