Acer AL2671W, Service Manual

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Chapter 4 57
Use the following procedure as a guide for Acer LCD TV AL2671W problems.
NOTE: The diagnostic tests are intended to test this model. Non-Acer products, prototype cards, or modified
options can give false errors and invalid system responses.
1. Duplicate symptom and obtain the failing symptoms in as much detail as possible.
2. Distinguish symptom. Verify the symptoms by attempting to re-create the failure by running the diagnostic
test or by repeating the same operation.
3. Disassemble and assemble the unit without any power sources.
4. If any problem occurs, you can perform visual inspection before you fellow this chapter’s instructions. You
can check the following:
power cords are properly connected and secured;
there are no obvious shorts or opens;
there are no obviously burned or heated components;
all components appear normal.
5. Use the following flow chart determine which part to be replaced.
NOTE: N.G. in the below figures means “No Good”.
Start
Start
Does the unit Power on
No power on
No
No
1
LCD Fail
2 4
11
9 7 5
3
Remote Control Fail
DDC / POP PIP Fail
RF No Signal /
HDTV Fail
TV Channel Fail
Unit Hang Up
Suddenly
AV1,AV2 Speaker
No Sound
AV3 Speaker
No Sound
Button Function Fail
10 8 6
Yes
Yes
Troubleshooting
Chapter 4