Acer X221 Service Guide - Page 46

Always show NO SIGNEL, NO SIGNEL, Change, Cable, Change U4

Page 46 highlights

3. Always show "NO SIGNEL" Change Cable "NO SIGNEL" NO Check VGA Cable Yes VGA Check C23,C24,R44,R4 5 Yes Change U4 NO Change R42,R43,FB1,R 44,R45 C23,C24

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