How?
R21, 25 and 26 are defective.
R21 is probably 14R, its value measure 13.54R (I can see brown, yellow on resistor)
R26 is burned, however, it measures 8.54R, this is that big resistor with wire on it.
So the question is what is the value of R25?
Other resistors are the following:
R18 = 94.9K
R19 = 5.00K
R20 = 200R
R22 = 3.53K
R23 = 7.41K
R24 = 749R
R27 = 26K
VR5 = 10K
B2 = 9V battery