Approx how expensive will it be to replace approx. 5 driver transistors and 3 resisestors on my jbl bp 1200.1 or should i buy new?

you can.

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Personally I wouldn't buy it. A power failure could indicate a serious problem. Most amp power failures are caused by power transistor failures. Sometimes these transistors can cost a lot of money if they are not common type. I once had a amp where one transitor would cost £50 to replace, and it need 3 of them!

Hi, if the above suggestions dont help it may be out of toner. according to your dates and numbers. average 17.5 copies per day. you purchased it approx..300 days ago. = 5,250 total copies !?

You could try switching around the cables but most likely the output driver transistors are blown.

Sounds like the Drum Bearings are gone they are **** on Hotpoint..Could be quite expensive depending on age...3 years old you will need a half drum complete with Bearings approx cost £80 plus labour....if more than 4 yrs old then perhaps bearing kit plus 3 hrs labour....Hotpoint give a FREE 5 yrs parts warranty however CALL CHARGE....£105 approx parts are free.....You need to ecide if you should fix or just buy a new one........

More likely to be the Class D power amp module, but you should look through the service manual to make sure all the parts are installed correctly. My PB10 AMP module went out and you cannot get one anymore.
http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf

I have a pair of Media 3 JBL computer speakers. I am using a generic 12V DC adapter rated at 1000mA with a positive tip polarity, and it works fine.

R417 18k, R418 4.7k, R407 10k,