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Macintosh Portable, what is R21 resistor value?

gijsmans

6502
I am restoring a Macintosh Portable 5120 (original) and have send the board to a technician who will recap the board. He sees resistor R21 looks bad too and measures an infinite value. He does not know what the value should be, can't read it anymore. 

Could someone have a look at R21 and tell us what the value of this resistor should be. Thanks a lot!!

ps. the picture is a clean board vs. our board

Screenshot 2020-07-17 at 16.27.59.png

f421ff09-ad76-4532-9ca1-6aa9327db967.JPG

 
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