I want to know what is the resistance value R32 - marshall g15rCD 15 watts

Hi, I have repaired loads of these kinds of amps. The first thing to check is if the input jack socket is still soldered to the circuit board properly. These have a tendency to break.
They all have a dual opamp and a 15 watt power amp chip. Invariably it is the power amp chip that fails IF it is an electronic fault. Both chips can be bought for a few pounds.
The variations, aux input, spring reverb and this, digital effects are extremely unlikely to cause this kind of failure.
At one time anyone with a screwdriver and a soldering iron could fix these, but in the days of health and safety, find someone who knows what they are doing.
It should take half an hour and about £3 worth of bits.
All the best, Chris the Fader.

you may have a loose connection

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TRY GIOVANIA FOR HELP.

Used small amps don't bring much money...

The best answer can be found by searching for COMPLETED ITEMS on eBay for like items.

Almost all of these small 15 Watt units run 8 ohm speakers...

Do NOT expect to get much improvement from changing speakers.

Behind the amp, right around where the power-supply is. Usually the right hand side at back of amp. Serial numbers are labeled as: S/N########

Do you have experience with electronics? Check for any broken solder joints around the circuit board. Test the resistance of the volume pot. The resistance should go from near zero to the resistance labeled on the pot. If either of these tips does not solve the problem, take it to a Marshall repair center(with the sales receipt of you have it) and they may fix free of charge. As long as it's not a transformer, it should be a cheap repair.

THANK YOU ENZO,
I FOUND THE BROKEN POTENTIOMETER IN MY PARTS BOX.(250 K OHM)
THE AMP HUMMED WHEN I PLUGGED IN A GUITAR.
THAT'S WHEN I KNEW TO REPLACE THE TRANSISTOR (LM1875T)
BASED ON WHAT YOU TOLD ANOTHER FELLOW ON YOUR FORUM.

I LOCATED A SEMICONDUCTER SELLER IN RUSSEL, PENNSYLVANIA
( B&D ENTERPRISES. 1- 800- 458-6053.)

THEY HAD THE TRANSISTER I NEEDED TO BRING THE AMP BACK TO LIFE.

I RECIEVED THE PARTS 5 DAYS LATER.
AND AFTER I INSTALLED THE PARTS, AND ASSEMBLED THE UNIT,I WAS PLAYING THAT AMP UNTIL BEDTIME... 10 PM.
WOW AM I HAPPY!!!
THANK YOU GUYS.... ALL OF YOU !!! ARITHEBASSPLAYER.... AND GUITARPLAYER