Daewoo DLP-2612, Service Manual

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8-2. Typical Symptoms of PCBs problem or bad connection
A. Symptom of initial latch up
- Define initial latch up: When turn on the power, both LEDs light up red and TV is not
working.
- Repairing method: This is typical symptom when ROM(ICU3) is incorrectly connected
at socket. So if you find this symptom, you must try to that ROM(ICU3) and socket
have correct contact.
- As this method, TV set is not repaired, replace MAIN PCB.
B. Symptom of No image when LED and Back Light are working.
- Define No image: LED and BACK LIGHT of panel are correctly working but any image
does not display.
- Repairing method: This is typical symptom when LVDS cable incorrectly connects. So
if you find this symptom, check LVDS connection.
- As this method, TV set is not repaired, replace Main or Sub PCB.
C. Representative Symptom caused by bad Connection between PCBs
=> Note: Dust or extraneous material may cause bad connections. Most of the time,
applying soft brush, AIR FRESHIER, or breath to clean dust or extraneous
materials can solve it . And then reassemble the Connector.