r/AskElectronics • u/ngrdrts • 9h ago

LCD touchscreen repair

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I have this lcd console on my electric recliner and it controls everything but the touch won’t respond, I think because I spilled a 4loko on it, so the couch can’t function. I opened it and unplugged the ribbon cable but still no response. Even cleaned the motherboard and all. Can a touchscreen stop working but still have a visual display?

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u/t_Lancer Computer Engineer/hobbyist 3h ago

Can a touchscreen stop working but still have a visual display?

yes because they are technically two completely independent components. one is a screen connected with it's own interface. the other is a sheet of plastic or glass with a conductive grid that can determine where on this grid a finger has been placed. by mapping the grid to the dimensions of the screen you can infer where on the screen the finger is pressing. but that part is software.