Midway Hydro Thunder 25in Upright Service Manual

Troubleshooting6-4
VGM Startup Troubleshooting Table, continued
SYMPTOMCAUSEREQUIRED ACTION
Power problem
1. Inspect circuit boards under low-light conditions.
LEDs glow if processor circuits receive voltage.
Fan should be turning. These indications prove
presence of DC from power supply. Still,
voltages or signals may not be normal.
Computer has no internal LEDs.
2. Turn on VGM power. Using 20-volt DC setting on
digital voltmeter, measure DC voltages at power
connector pins. (Power supply voltage isn’t...

Troubleshooting6-5
VGM Startup Troubleshooting Table, continued
SYMPTOMCAUSEREQUIRED ACTION
Faulty coin
mechanism
1. Unlock and open coin door. Check each
currency acceptor to assure proper mounting.
Verify that each release latch is closed and
locked. Does mechanism accept and reject
currency correctly? Test mechanism with good
and bad coins.
2. Inspect to see if external acceptor indicators
(Pricing, Flashing Arrows, etc.) are lit.
3. Verify that each acceptor operates properly by
placing it in working...

Troubleshooting6-6
Audio Troubleshooting Table
SYMPTOMCAUSEREQUIRED ACTION
Improper volume
setting
Enter Menu System by pressing and holding
TEST MODE switch. From Operator (Main)
Menu, choose VOLUME MENU. Check that
Attract Music is on (enabled). Verify that all
volume levels are set well above zero. If
necessary, change levels to make VGM audible.
Faulty wiring
Turn off VGM power. Assure that wiring harness
connectors attach and fully seat onto mating
board connectors. Verify that harness connects
to...

Troubleshooting6-7
Error Message Troubleshooting Table
Power-On Self-Test Beep Codes
(Audio beeps only. Video may or may not be present): See Note 1
MESSAGEMEANINGREQUIRED ACTION
No beepNo system powerCheck power supply and cables
1 continuous beepPartial system powerCheck power supply and cables
1 short beepNormal start; no errorsCheck other VGM components
2 short beepsProcessor problemCheck processor/fan module
3 short beepsGraphics initialization problemCheck Video Board, cables
4 short beepsProcessor...

Troubleshooting6-8
Link Troubleshooting Table
SYMPTOMCAUSEREQUIRED ACTION
Faulty wiring
1. Don’t extend linking cables that come with VGM.
2. Install required crossover between VGM
cabinets. Each coupler connects two cabinets
(one pair). Don’t use standard telephone type
couplers or wiring to link cabinets.
3. Use only 10Base-T, Ethernet-type, Category 5,
twisted-pair wiring for VGM data.
• Can’t connect VGMs (video
game machines) together
Improper linking
hardware
Use required network hub for your local...

Troubleshooting6-9
Player Control Troubleshooting Table
SYMPTOMCAUSEREQUIRED ACTION
Faulty switches or
lamps
1. Enter Menu System by pressing and holding
TEST MODE switch inside coin door. From
Diagnostic Menu, choose SW ITCH TEST. Run
tests to confirm switch operation.
2. Check for loose parts or wires caught in switch
contacts.
3. Check continuity at each switch connection
(Common to Normally Open or Common to
Normally Closed).
4. Verify that control operates properly by placing it
in working VGM.
5....

Troubleshooting6-10
Player Control Troubleshooting Table, continued
SYMPTOMCAUSEREQUIRED ACTION
Blocked or faulty fan
W ith VGM power on, check airflow near each
computer fan. Case cooling fans are intake fans.
Power supply fan is exhaust fan. Assure that
nothing blocks airflow.
Faulty mechanical
parts
Turn off VGM power. Open dashboard. Support
steering wheel and remove outer mounting
screws. Remove metal shield (if your VGM has
one) over motor. Inspect for faulty or worn belts,
bearings, couplings,...

Troubleshooting6-11
Player Panel Controls
WARNING: The W heel Driver Board heatsink, power resistors, and other components
may be very hot. The DC Motor in the steering wheel may also be hot.
Steering Components 

Troubleshooting6-12
Video Troubleshooting Table
SYMPTOMCAUSEREQUIRED ACTION
Power problem
Verify connection of AC Power to video monitor.
Inspect CRT neck in dim light. Glowing filament
near CRT base proves that some monitor
circuits receive power. Still, voltages or signals
may not be normal.
Faulty wiring
1. Turn off VGM power. Verify that video signal and
Remote Adjustment Board connectors seat
properly on Video Monitor Board.
2. Assure that video cables connect to circuit
boards and computer.
3....

Troubleshooting6-13
Video Troubleshooting Table, continued
SYMPTOMCAUSEREQUIRED ACTION
Floppy disk in drive
Check floppy drive for diskette. If you find disk,
eject it. Leave VGM power on. Turn off
computer. W ait for hard disk to stop spinning.
Turn on computer.
Faulty wiring
Loosen computer case lid thumbscrews and lift
off cover. Assure that hard drive ribbon cable
connector is fully seated into mating connector
on motherboard. Check hard drive power cable.
Improper components
1. Verify that hard disk...