Video Troubleshooting Table, continued
| SYMPTOM | CAUSE |
| REQUIRED ACTION |
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| Check floppy drive for diskette. If you find disk, | |||
• VGM (video game machine) | Floppy disk in drive |
| eject it. Leave VGM power on. Turn off | ||||
| doesn’t appear |
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| computer. Wait for hard disk to stop spinning. | |||
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| Turn on computer. |
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• | No audio |
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| Loosen computer case lid thumbscrews and lift | |||
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| Faulty wiring |
| off cover. Assure that hard drive ribbon cable | |||
• |
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| connector is fully seated into mating connector | ||||
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| on motherboard. Check hard drive power cable. | |||
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| 1. Verify that hard disk drive is correct for this | ||||
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| Improper components |
| VGM. Label on drive records manufacturer | |||
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| name, assembly number and program version. | |||
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| 2. Verify that | circuit boards | are correct | for this | |
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| VGM. Label on each board | records | ||
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| manufacturer name, assembly number and | |||
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| hardware version. |
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| 3. Verify that ROM instruction set is correct for this | ||||
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| VGM. VGM set includes more than one ROM. | |||
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| Label on each ROM records assembly number | |||
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| and software version. |
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| Hard drive problems | 1. Turn computer on. Immediately look under hard | ||||
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| drive. Hard Drive Activity LED flashes if drive is | ||||
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| operating properly. |
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| 2. Allow VGM to load normally. Note and record | ||||
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| any error messages that occur during | |||
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| 3. Remove hard drive and install it in working VGM. | ||||
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| If symptom recurs there, hard drive is faulty. | |||
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| Replace it. |
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| Picture tube aperture |
| Remove diskettes from room. Demagnetize | |||
• Blotches of color appear on | mask is magnetized |
| monitor with external degaussing coil. Take care | ||||
| screen |
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| not to magnetize neighboring VGMs. Monitor | |||
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| may be on or off for this procedure. |
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| 1. | Turn on VGM. |
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• White areas in center of | Picture tube purity or | 2. | Press and hold TEST MODE to enter Menu | ||||
| screen appear tinged with | static convergence is |
| System. At Operator (Main) Menu, select | |||
| color | out of alignment |
| Diagnostic Menu. Then select Monitor Patterns | |||
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| Menu. Run through Crosshatch, Red, Green and | |||
• Object edges have fringe of |
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| Blue screens to find clearest display of problem. | ||||
| one or more colors |
| 3. | Display screen with greatest problem. |
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| 4. Display Crosshatch Screen. Locate purity and | ||||
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| static convergence ring magnets on back of | |||
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| monitor neck. Watch screen in mirror. Adjust | |||
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| magnets | to minimize | problem. | Follow |
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| instructions from monitor manufacturer. |
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| 5. | Display Crosshatch Screen. Touch up | |||
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| adjustments while watching screen in mirror. | |||
CAUTION: Don’t operate the monitor without its Remote Adjustment Board.
WARNING: HANDLE FLUORESCENT TUBE AND CRT WITH CARE. If you drop a fluorescent tube or CRT and it breaks, it will implode! Shattered glass can fly eight feet or more from the implosion.
Troubleshooting
