No 800-MHz signal input at pins (186), (187), (191), (192), (196) and (197) of IC2201.
Check system cable and connector.
No signal output from pins (95), (96) and (97) of IC2201.
Check IC2201 and peripheral circuits.
Disconnect system cable and operate LCD independently. (Blue screen appears.)
Check system cable, connector and peripheral circuits.
Is each pin normal at IC4701?
Faulty: Check IC4701 and peripheral circuits.
Is each pin normal at IC4901?
Faulty: Check IC4901 and peripheral circuits.
Is each pin normal at IC4551?
Faulty: Check IC4551 and peripheral circuits.
Check SC4501, -4502, -4503 and -4504 and their cables.
Check outputs of main unit and headphone.
Is signal waveform normal at Q2105 and Q2106?
Faulty: Check Q2105 and Q2106 and peripheral circuits.
Is signal waveform normal at IC3802 and IC3804?
Faulty: Check IC3802 and IC3804 and peripheral circuits.
Is signal waveform normal at IC3805, IC3806 and IC3807?
Faulty: Check IC3805, IC3806 and IC3807 and peripheral circuits.
Check IC3809 and peripheral circuits.
1No Picture
2No Sound
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