If you have an Adcom amp in the 535 or 555 series and you somehow manage to trip the Thermal Protection indicator, don't despair. Unless you have been seriously over-driving the amp, you may be able to solve the problem yourself. I stupidly tried to make a speaker cable change or adjustment a few months ago, and the amp died, tripping the TP indicator. I went online and found that in many instances, an internal fuse (there are generally 4 of them) could be blown. I ordered some 4 amp fuses from Amazon (a financial mistake); they arrived a few days later and I took the top cover off of the amp to install as many as needed. First thing I learned is that you need a fuse puller to remove a fuse. Went to the local NAPA store and got a cheap one for less than $4. The first fuse I pulled was blown, but the other three were fine, and I took that as a good sign. Installed a new fuse, plugged the amp in and hit the power button....it came on as normal and I breathed a sigh of relief. I haven't actually tried to use it yet, but expect no further problems. About one year ago, I had a similar problem with my GFA-555ii amp, and paid $140 to a repair shop to get it fixed. I have no doubt that was nothing more than a blown fuse, so a valuable lesson was learned there.
