Keypad Touchpad Problems; Usb Problems - Sharp LC-22LE240E Service Manual

LC-22LE240

21.5. Keypad Touchpad Problems

Problem: Keypad or Touchpad is not working
Check keypad supply and KEYBOARD pin on MB62.

21.6. USB Problems

Problem: USB is not working or no USB Detection.
Check USB Supply, It should be nearly 5V.
21.7. No Sound Problem
Problem: No audio at main TV speaker outputs.
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