Midway 4-Player 25" Dedicated Video Game manual VGM Startup Troubleshooting Table

VGM Startup Troubleshooting Table

	SYMPTOM	CAUSE		REQUIRED ACTION
• VGM (video game machine)		Power problem	1.	Check that VGM power switch is on.
			2.	Inspect electronics to see if fans are turning. If
	doesn’t start.			not: Is power supply connected to its power
•				cable? Is power supply turned on?
	VGM appears completely		3.	Plug VGM into AC power outlet. Verify presence
	non-functional.			of AC line voltage.
•				Turn off VGM power. Unplug AC line cord. Check
	No audio	Improper line voltage		line voltage switch. If necessary, set it to agree
		switch setting		with local AC line voltage. Retest VGM.
•	No illumination		1.	Turn off VGM power. Examine AC fuse on power
		Open fuse		supply.
•	No video display		2.	Examine DC fuses inside coin door vault.
			3.	Replace faulty fuses with identically rated parts.
			4.	Turn on VGM power. If fuse opens again, check
				DC wiring harness and connectors.
			1.	Remove line cord. Test line cord, power plug,
		Faulty wiring		and IEC connector for breaks or damage. Verify
				continuity of each wire in cord. Install cord at
				power chassis. Press connector firmly to seat it.
			2.	Check other cables in same manner.
			3.	Assure that cabinet wiring harness connectors
				fully seat in corresponding power supply and
				board connectors.
			4.	Inspect wiring for breaks or damage.
			1.	Turn off power for one minute and turn VGM on
		Faulty circuit boards		again. Power On Self-Test checks electronics.
			2.	Replace faulty parts and rerun self-test.

Typical Location of Power Supply and Line Cord

Troubleshooting 6-3