In meProg, go to View > Volts and click the "Read Actual" button.
If it shows a good VPP voltage then the charge pump is working. (L1 is part of the charge pump)
And if the charge pump was not working, the LED would flash RED on power-up.

It is very difficult to damage a U2 programmer, unless you didn't get the plastic case and shorted the board out on something.
Look for other causes first. Try a different chip. Try a different part number. Use a programming adapter, if you are programming in-circuit now.

The schematic for the U2 will never be released.