MiTAC 8050QMA Manuel de service télécharger pdf (Page 113)

112

50QMA

N/B Maintenance

There is no display on both LCD and VGA monitor after power on although the LCD and monitor is known-good.

8.2 No Display-1

No Display

Monitor

or LCD module

OK?

Replace monitor

or LCD.

Board-level

Troubleshooting

System

BIOS writes

error code to port

378H?

Yes

Refer to port 378H

error code description

section to find out

which part is causing

the problem.

Make sure that CPU module,

DIMM memory are installed

Properly.

Display

OK?

Yes

Correct it.

To be continued

Clock,reset and power checking

Check system clock,

reset circuit and

reference power

Replace

Motherboard

1.Try another known good CPU module,

DIMM module and BIOS.

2.Remove all of I/O device ( HDD,

CD-ROM…….) from motherboard

except LCD or monitor.

Display

OK?

1. Replace faulty part.

2. Connect the I/O device to the M/B

one at a time to find out which part

is causing the problem.

Yes

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MiTAC 8050QMA Manuel de service Page 113

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