Can you please upload clear or high resolution pictures of both sides of PCB
(Component and solder side). This can help to locate the problem. “In most cases the problem has been bad soldering or solder bridge on the board.”
There have been several similar cases discussed in the forum:
Your calibration results may indicate that “the charge pump” is not working.
If this is the case, there is no -5V on the board.
As a first test, check the voltage on pin 4 of IC2.
There should be about -5.2V.
If not, check all the voltages of the charge pump.
In this thread there are instructions and voltage values:
If -5V is OK, then check the voltages on all pins of IC1 and IC2.
Here are the voltage values:
Also check IC2 orientation.
In the following threads there are some examples of about similar problems and solutions:
Hope this will help you further to solve the problem