Mcufriend 2.4" TFT touch panel has a hardware issue

[thaveesha_jayasinghe]

I have a Mcufriend 2.4" TFT shield which I bought about a year ago. I didn't use it much after I bought it. But now I have a new project idea. I want to make a table lamp which can be controlled by a TFT touch screen like I bought earlier. so I took it again, attached with Arduino Uno and uploaded an example code that came with MCUFRIEND_kbv library called "button_simple". It didn't work well. The interface appeared without any kind of issue, but when I touch the screen to test it, the button on the interface wasn't working. So I uploaded a new example code which came with the same library called "TouchScreen_Calibr_native". After I uploaded that code, the screen showed a message like this.

Touch Calibration Failed
unable to read the position of the press.
This is a hardware issue and can not be corrected in software.
check XP, XM pins with a multimeter
check YP, YM pins with a multimeter
should be about 300 ohms.

And I don't know how to deal with this issue. Also, I figured out that there is a connection between two pins on TFT display which was connected to 3.3v pin and ground pin on Arduino after the TFT attached to Arduino. Is it ok to have connection between that pins?

I want to know, is this fixable or not and if it is fixable, how can I fix it. So I hope a great help for this issue.

[david_prentice]

Please copy-paste from the Serial Terminal to your message.

Your photo looks like a Touch Panel but we can't see the 4 terminals at the bottom left of the screen.

If your screen has a cracked glass it means that the Touch is broken. Your photo does not show the whole screen.

David.

[thaveesha_jayasinghe]

Thank you for your quick response. Here is the message which appeared on Serial Monitor.

TouchScreen.h GFX Calibration
Making all control and bus pins INPUT_PULLUP
Typical 30k Analog pullup with corresponding pin
would read low when digital is written LOW
e.g. reads ~25 for 300R X direction
e.g. reads ~30 for 500R Y direction

MISSING TOUCHSCREEN
ID = 0x9340

[david_prentice]

That looks like a Touch Panel. e.g. 4 tabs at bottom left going to a 4-way ribbon.

But the software does not find any Touch pins at all. I can't see any cracks in the glass.

I suggest that you use a DMM.

David.

[thaveesha_jayasinghe]

Actually I saw some small cracks on Touch Panel glass after your message.

And the word DMM stands for digital multimeter right?
what should I check for using it?