Troubleshooting - Acer AL2671W Service Manual

Troubleshooting

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".
No power on
LCD Fail
TV Channel Fail
1
2
Chapter 4
Start
Start
No
No
Does the unit Power on
RF No Signal /
DDC / POP PIP Fail
HDTV Fail
Remote Control Fail
4
5
3
Yes
Yes
Unit Hang Up
Suddenly
AV3 Speaker
Button Function Fail
No Sound
6 8
7
Chapter 4
AV1,AV2 Speaker
No Sound
10
9
11
57