The fan of my iMac died. As a result, also the motherboard has to be replaced. The cost: 80 1h work 40 fan 770 motherboard ... which is too expensive. I'm looking for a way to replace the motherboard myself. Should I just start looking on eBay for similar iMacs? (early 2008, 3.06GHz EE, 24") Or should I simply give up?