Level 2 Circuit Board And Standard Parts Replacement; Trouble Shooting Guide - Acer H233H Product Service Manual

6. Level 2 Circuit Board and Standard Parts Replacement

6.1 Trouble Shooting Guide

6.1.1 No Display or display is unstable (Interface Board)
No picture or picture unstable
Does cable plugs in connector ?
Does power stable ?
Is LED light green/orange ?
Is LED status normal ?
Does crystal work correctly ?
Is interface BD normally ?
Replace panel
Power off
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Turn on power
No
Check all of wires then turn
on power switch again
No
Check Power BD
No
Check control BD
No
Check Scalar or replace it
No
Check crystal Y1 CKT or
No
Replace interface BD
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replace it