I was in panic having been told by Apple my I mac was now classified as obsolete - unfixable. I'd smelt burning. I called London Bit Medic and got Aonghus. He said he could come and diagnose the fault. Over the phone he gave me good advice, various options and their costs. He came after the weekend in the evening, spent a good 2 hours, took the I mac apart, ran it, set up tests. Charge £80.00. The I mac is now running ok. I may decide to buy a new one or get a refurbished one next year. If I do I will definitely use Aonghus to set it all up, load from back up etc . Top class guy, highly recommend. Nick Would