Acer H233H - Level 2 Circuit Board and Standard Parts Replacement; Trouble Shooting Guide

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