T2 Display Problem / re-flash ROM ?

[trunkenpolz]

I recently got a T2 which has a display problem.

The display reacts delayed on multiple inputs, the first input works fine, any further inputs require a waiting time. During a few seconds after a first input no further inputs are accepted, after 4-5 seconds the next input works again.
Trying with ScreenTest shows that the display seems to be calibrated correctly, moving the stylus without releasing pressure works good without recognizeable delay. The test shows no dead areas on the display an no offset.
So before i disassemble the T2 to check for dust under the display bezel i want to ask if anybody knows the problem and perhaps a solution.
To me it seems that the signal analysis process locks... :confused:
Could re-flashing the ROM solve the problem? Can anyone help me with a ROM - file and/or information about re-flashing the original ROM?

Greets & thanks...

[dmitrygr]

have you tried a simple hard reset?

[trunkenpolz]

Sure.

I made some hardresets the usual way (power button pressed, reset pin, release power button, delete all data etc...)
Since i got the T2 it ran 3 or 4 times out of battery power and started with the setup procedure. So i think this were enough hardresets.
Or ist there anything further to know? Someting like a "low-level-format"?

EDIT: The hint about resetting was useful though...
I disassembled the device and left it without battery overnight. There wasnt any dust under the display bezel but now it seems to work properly.
The digitizer reacts quite good, although ab slightly bit more slowly compared to my TE.