[Elecraft] K2 Control Board Issue

[Glenn Haffly]

Doing something I should have not done , I managed to blow up Q11on the
control board. I fixed that with a replacement from my junkbox. All
voltages are correct on control board U3. When tapping display I get a
voltage of 23.3 volts indicated from a 12 volt supply and zero current.
Further checking shows R7 on the control board is zero ohms instead of
1.78K. How important is it to replace R7
with a 1% resistor rather than something from the junkbox?
Everything else on the K2 works fine , TX and RX are OK.
Hopefully a replacement R7 will then display the correct voltage and
current.
Any input from the reflector is appreciated.
Glenn , K5ZE