[Q] Touchscreen not responding - Nokia Lumia 920

Hello Everybody!
I've been using my Lumia 920 for a month now, and few days ago, I picked my phone and touchscreen was not responding.
I used device very carefully - so there was nothing like drops or something.
I tried Soft Reset, Hard Reset nothing helped.
I connected device to Nokia Care Suite, and runned the Self Test.
All tests were OK, but these two Failed
ST_TOUCH_TEST and ST_TOUCH_IF_TEST
What does this mean? Should I replace touchscreen digitizer or it's something else?
ST_TOUCH_IF_TEST Details:
Code:
Test name:
Touch interface self test
Test description:
The test verifies data and control lines between MCM and touch controller.
Result:
MINOR
Result (detailed view):
Failed loading the driver
Data description:
Detailed result contains HwFails bitmask. Zero means all was ok, and fail codes are:
- SELF_TEST_HW_FAIL_CONTROL 0x0001 (No communication with a device at all)
- SELF_TEST_HW_FAIL_BIST 0x0004 (Component internal self test)
- SELF_TEST_HW_FAIL_INTERRUPT 0x0010 (Interrupt line fails)
Method description:
Touch driver identifies controller by reading of the test register via control interface. Interrupt is generated for INT line verification by setting the threshold low enough.
ST_TOUCH_TEST Details:
Code:
Test name:
Touch internal self test
Test description:
The test verifies internal functionality of touch module.
Result:
MINOR
Result (detailed view):
Failed loading the driver
Data description:
Detailed result contains HwFails bitmask. Zero means all was ok, and fail codes are:
- SELF_TEST_HW_FAIL_CONTROL 0x0001 (no communication with a device at all)
- SELF_TEST_HW_FAIL_INTERRUPT 0x0010.
Method description:
Build-in selftest for touch sensor network verification is run where RAW values of the sensor network are read and they are verified to be within the specified limits. The touch screen should not be pressed during the selftest.

---

Was that with or without a screen protector? Sometimes a screen protector can get dirty or get dirt around or under the edge and trigger false touches which will make it appear to be locked or not function.
If it was just the straight touchscreen then sounds like it needs service.

---

Solarenemy68 said:
Was that with or without a screen protector? Sometimes a screen protector can get dirty or get dirt around or under the edge and trigger false touches which will make it appear to be locked or not function.
If it was just the straight touchscreen then sounds like it needs service.
Click to expand...
Click to collapse
I used device without screen protector.
I can't take it to Care Center, because I bought device from USA, and I guess warranty isn't valid here.
I called them, and they said that they probably should replace screen assembly, which will cost me almost the same price I paid for phone.
Meanwhile, I can buy screen assembly(or just digitizer) online and replace myself, but I need to be sure it'll solve problem.