MITAC A790
Manual de Servicio

A790 N/B Maintenance
8.12 Modem Test Error
An error occurs when run the modem.

MODEM Test Error 1.Check if the driver is installed properly. 2.Check if the notebook connect with the phone LAN properly.

Test OK? No

Yes

Replace a known good modem

t ent e cr m Se cu c Do al iT ia Mt n e d fi n o C
Board-level Troubleshooting Correct it. Replace Motherboard
U506 J10 J14 J7 F505 L531 L527 H1 H2 H3 H4

Check the following parts for cold solder or one of the parts one at a time and test after each replacement.

following parts on the mother-board may be defective, use an oscilloscope to check the following signal or replace the

Parts:

Signals:

ACZ_SDOUT0 ACZ_SDOUT1 ACZ_RST# ACZ_SYNC0 ACZ_SYNC1 ACZ_BIT_CLK0 ACZ_BIT_CLK1 ACZ_SDIN0

Re-test OK? No

Yes

Correct it.

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