Chosen Solution
Hi, I came home from work (where my MBP was working just fine), got home and started it up (not from sleep), but got no startup chime, sleep LED was on and the optical drive was running, but nothing else. I did some research and found out about the Nvidia chip problems and the logic board problems. So I bought a brand new LB, which has the revised 8600 GT chip, (and according to the seller, was tested in a mac before being sold) and installed it today. I followed all the directions to the “T” from this website (THANK HEAVENS you are here) but when I got everything back together and attempted the startup. It exhibits the same symtoms. It COULD be another bad board, but I also remember vaguely reading something here where someone mentioned it could be a bad left I/O board. Well, I am not sure. The power adapter plugs in and it lights up green when the battery is charged, but is that amber color when it is not. so - I know it is charging the battery. Could it still be a bad left i/o board? Thanks a million! Jerry MBP 2.5 Ghz. 17inch (early 2008) A1621 4 GB RAM OSX 10.5
The warmth coming from the F-Keys is because your fans aren’t working properly. Please shut the machine off. Sounds like u have a fried I/O Board. I don’t think you need a logic board. Try replacing the left I/O board. Ask the seller of the Logic Board you purchased if he’s willing to cut u a deal and sell you the left I/O Board.
I am having exactly the same issue - did you ever get it resolved? One difference with mine: After various troubleshooting (removing ram, starting with no battery, etc.) I left it for 2 days, then miraculously it booted. However, then I put it to sleep and now have the same issue again.
Any tips on what your issue ended up being?
Thanks!
Hi Turn laptop upside down and wrap in towel or bed duvet while switched on for about 30mins then switch off and let cool down still upside down for again approx 30mins, Switch on again and if it works it is a solder problem with your graphics chip on the motherboard it will work for a while like this but you will really need to get the solder reflowed on your motherboard especially the graphics chip. Let me know what happens. Yours Sincerely Jeremy PS Do not sell like this as unfair to person who buys when you know about this fault. jeremy.belshaw@sky.com Disabled former Forman Electrician latest qualification HNC/D in computing and information technologies.
