The Remote Control Does Not Work; The Display Does Not Work/ Display Abnormality - Sharp PN-L803C Service Manual

2. THE REMOTE CONTROL DOES NOT WORK

Is the battery power alive?
No abnormality
Check the Key PWB and the related parts for any
abnormality.
- Check the connection cable.
- Any problem with the Key PWB?
No abnormality
Check the Main PWB and the related parts for any
abnormality.
- Check the connection cable.
- Check the PWB.
3. THE DISPLAY DOES NOT WORK / DISPLAY ABNORMALITY
Check the adjustment and setting for any abnormality.
No abnormality
Is input selection set to signal input?
Yes
Digital connection (Displayport) only
- Is the graphic board resolution proper?
Yes
Digital connection (HDMI/Displayport) only
- Check that the connected devices are not special ones
(out of support).
Yes
Check the video input signal for any abnormality.
- Check the video cable.
- Check that the video cable (HDMI/Displayport) not a
special one (out of support).
- Check that the video signal is not a special one
(out of support).
No abnormality
Is the menu displayed under the signal input state?
Yes
- Check the connection cable.
- Check the T-CON PWB.
No abnormality
Check the Main PWB, LCD-TCON PWB and the
related parts for any abnormality.
- Check the connection cable.
- Check the fuses for breakage.
- Check the PWB.
Consumption
Abnormality
Abnormality
Abnormality
No
No
No
Abnormality

No
Abnormality
Abnormality
PN-L803C/80TC3 TROUBLESHOOTING 7 - 2
Replace the battery.
Replace the abnormal part.
Replace the abnormal part.
Readjust and reset with the menu.
Adjust the input source properly.
Replace the graphic board.
Check the connected devices.
Replace the abnormal part.
Check the Main PWB and the related parts.
- Check the connection cable.
- Check the fuses for breakage.
- Check the PWB
Replace the abnormal part.
Replace the abnormal part.