Скачать или смотреть How to Fix Samsung A20e SM-A202F Touch Screen Problem | Touch Not Working Hardware Solution

If your Samsung A20e (SM-A202F) touch screen is unresponsive, partially working, or not detecting touch input, this video provides a full hardware repair solution. Common issues include damaged touch flex cable, touch IC failure, or broken data lines. Follow these 30 detailed steps to test, repair, replace, or jumper the touch circuit and restore full touch functionality.

✋ Common Touch Screen Issues
Screen not responding to touch

Partial touch functionality or dead zones

Touch stops working after screen replacement

Ghost touch or erratic behavior

Touch delay or lag

🧰 Tools Required
Multimeter

Hot Air Station

Soldering Iron

Microscope

IPA Cleaner

Jumper Wires

Replacement Touch Panel or Flex Cable

🔧 30 Step-by-Step Instructions
Power off Samsung A20e SM-A202F

Remove SIM tray and back panel

Disconnect battery safely

Remove the LCD and touch flex cable

Inspect touch flex cable for tears or corrosion

Clean connector and flex with IPA

Connect a working touch panel for testing

Power on the device and test touch response

If still unresponsive, inspect mainboard connector pins

Use microscope to check for broken or bent pins

Test touch data lines with multimeter for continuity

Confirm connection from touch connector to touch IC

Jumper any broken or open data lines carefully

Check for corrosion or cold solder joints near connector

Locate and identify the touch IC on the mainboard

Measure input and output voltages on touch IC pins

Reflow touch IC using hot air if output missing

Replace touch IC if reflowing fails

Inspect nearby filter components (capacitors, resistors)

Replace damaged or burnt SMD components

Test for shorts or opens in the touch circuit

Check grounding and shielding lines for continuity

Clean reworked area with IPA

Reconnect battery and touch panel

Power on and perform full screen touch test

Open phone settings and check multi-touch functionality

Use test code ##2664## or Samsung service menu

Confirm smooth, accurate touch response

Reassemble device carefully

Done, Samsung A20e touch screen problem fixed fully

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