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COF and logic BUFFER has problem. If no problem, check if the connection sockets between the logic
BUFFER and the logic board is normal. If it’s normal, then replace the logic BUFFER. If the problem still
remains after the replacement, then replace the logic board. Finally if the problem is still there, then the
problem lies with COF.
6.There appear on the screen abnormal bright spots or blocks that are different from what’s described
above:
a. Check if the connection socket between COF and logic BUFFER board has been well plugged.
b. Replace the logic BUFFER board. If it’s not solved then replace logic board. If the problem still
remains, then it’s the problem with COF.
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