Hello,
This is a non working HP-27S (s/n 2820A02945).
- The case has been opened by someone before and the display does not properly get in contact with the PCB anymore.
I have to firmly press the PCB against the LCD display (and with force) to make it shows something like "MEMORY LOST" on power up (which is normal with new batteries inserted)...
Even with a small block of foam installed between the PCB and the back case can't give a satisfied result.
- About the serial number :
The first (left-most) four digits date code are 2820(HP-22S) ... not the 2749 for HP-27S ?
Any ideas ? Thanks