Blown JBL PX300.4 Amplifier?

I have 2 multimeters of the same brand and model.  1 is just newer.

After you talking about the mosfets before, I was doing some research on them, and apparently your meter has to diode test with more than 3.3 volts.  I set one meter on diode testing, and set the other to read DCV, and it read 2.76 V.  Did the reverse and the other read 2.91 V.  Are my meters ok, or do I need one that does 3.3 volts?

Either way I'm willing to try.  I want to learn more than anything.  I appreciate your help.  I read in another thread that you run your amps in 1 ohm sometimes, even if they arent' stable and then you just fix them if they blow - so I'm assuming you're the man for the job.

Thanks a lot!

I have no idea about the 3.3V thing you are talking about.  I am not familiar with that particular amp.  Can you take a picture of the circuit board.  One photo of the top of the circuit board will be fine.  No need to remove any clamps yet.

I remember that thread, I think I was telling him not to do it.  He wasn't hearing that.  SO I tried to scare him into not doing it.

Here are the pictures:

1.Superior view of the circuit board

2.Superior view of the circuit board zoomed (1/2) (The capacitors I changed are the 2 brown ones that are right at the top left of this picture- may be difficult to see the brown)

3.Superior view of the circuit board zoomed (2/2)

4.Inferior view of the circuit board

Bottom photo.  The 8 larger devices are the output transistors.  With your meter set to the diode test function, touch one meter lead to the large area of metal on the back of the transistor, the other meter lead first on the left leg, notice the reading on the meter.  Then move that lead to the right leg.  Notice the reading.  Check all 8 of the transistors, One or two of them will give you a very low reading compared to the others.  Let me know what you find out.  Do not power the amp up without mounting the board back into the heat sink.  You must put all screws back in.  All screws that hold transistors down.  Cover screws ok to leave out.  

If you find the devices that are shorted, give me the numbers on the front of the device.

Ok, so essentially just to brifely go over my meter.  When I set it to diode testing - is I hold the probes in the air it reads 1 on the display - so 1= no connection.  On the diagam "*" means that it gave me a reading slowly kept increasing and after 1900ish it went to 1.