Read Flash Memory ATMEL AT89C52 Microcontroller

[2X]

Hi,
I am trying to read the flash memory from the ATMEL AT89C52 microcontroller (from a damaged PCB) with the T56 universal programmer, but I am getting an error (images 2,3,4). The error says that the pins 38 & 39 from the microcontroller don't contact with the zif connector from the programmer. I measured all the pins from the microcontroller with the multimeter in diode mode and all pins show approximately 0.6V except from the pins 38 & 39 where show OL (image 9 - I suspect that these pins are damaged). Also, I remove the Check ID (images 4 &5) option from the programmer’s software and the programmer shows "Read Succeed" but didn't read something at all… all are FF.
There is something where I could do to read the flash memory?

[PCB.Wiz]

If the part is secured, you will not be able to easily read the contents.
If pins are damaged, the chip may also be internally damaged.

[bobxyz]

Your first screenshot says: "No Programmer Found" and "Demo running as TL866II Plus Programmer".  In other words, it's running in demo mode and is ignoring the actual programmer.

[2X]

Your first screenshot says: "No Programmer Found" and "Demo running as TL866II Plus Programmer".  In other words, it's running in demo mode and is ignoring the actual programmer.

In first picture I haven't connect the programmer. The programmer is connected fine but I can't read the MCU.

[2X]

If the part is secured, you will not be able to easily read the contents.
If pins are damaged, the chip may also be internally damaged.

The MCU working... it is from a control panel of a Fendt 250V 1991 tractor. The problem is that not only digits on the LCD display are displayed (I have install new LCDs and LCDs drivers).

[Atlan]

It is very likely that read protection is enabled.

[wraper]

This MCU has parallel programming interface. Most of the pins are required for programming. So if you have some I/O damaged, you won't get the data out even if read protection is not enabled. https://www.microchip.com/content/dam/mchp/documents/OTH/ApplicationNotes/ApplicationNotes/DOC0285.PDF
Edit, you could try baking the chip to ~150^oC. There is some chance that if it's a bond wire issue, they may regain contact for a while.

[2X]

I bought some new chips and all are read it fine.

[2X]

This MCU has parallel programming interface. Most of the pins are required for programming. So if you have some I/O damaged, you won't get the data out even if read protection is not enabled. https://www.microchip.com/content/dam/mchp/documents/OTH/ApplicationNotes/ApplicationNotes/DOC0285.PDF
Edit, you could try baking the chip to ~150^oC. There is some chance that if it's a bond wire issue, they may regain contact for a while.

There is a way for serial programming?

[up8051]

No.
AT89C52 has only parallel programming mode.

[mikerj]

Are you sure this missing segments aren't caused by a PCB fault, e.g. broken trace or via?

[2X]

Are you sure this missing segments aren't caused by a PCB fault, e.g. broken trace or via?

Yes. I checked all of them.

[PCB.Wiz]

The MCU working... it is from a control panel of a Fendt 250V 1991 tractor. The problem is that not only digits on the LCD display are displayed (I have install new LCDs and LCDs drivers).

Your only option may be to ask the supplier for a programmed part, or a replacement board ?
How functional is the unit? Aside from visual effects, how partially operational is it ?