Yes that's right I've broken something. A little while ago I picked up an Ariston AX-910 integrated amplifier at a car boot sale for just £4. The AX-910 is essentially a re-badged Cambridge Audio A1 mk3 but with a simplified pre-amp board. I have downloaded the schematic for the A1 mk3 and the power amp boards are identical. To cut a long story short, this evening I forgot to turn the power off whilst 'messing about ' inside the amp it went BANG. Lesson learned. I'm pretty sure that what happened is that I caused a short circuit between points 'A' and 'B' marked on the image below. [URL=http://s983.photobucket.com/user/mikepickwell/media/scan0001_zps1fba23fa.jpg.html][IMG]http://i983.photobucket.com/albums/ae313/mikepickwell/scan0001_zps1fba23fa.jpg[/IMG][/URL] The short resulted in the expected 'POP' and sparks. I turned the amp off as quickly as I could and found that fuse F3 had blown (T 4A). Initially I thought/hoped that maybe the fuse blowing had prevented any further damage but after I replaced the fuse and turned the power on again one of the TDA1514A IC's (IC U8) went up in smoke. :( I have already ordered a pair of replacement TDA1514A IC's. When these arrive what procedure should I follow and what checks should I make before powering up the amp again? I guessing that simply installing the new IC's and 'hoping for the best' is not the best idea.