Chosen Solution
Hi So I got this macbook from a freind, it was working fine until one day, there was the chime but just loud fans no apple logo or anything else, a PRAM reset is not possible I ve reset the smc a couple of times and tried all different combinations of RAM etc, I can t seem to find a description of this problem anywhere thanks Damien Update hi thanks for your answer, I tried connecting a display and nothing happened, still the same thing, I ve considered it might be RAM slot death or a bad smc chip, and the unit doesn t have a hard drive in it but it never gets the folder with a question mark it just has a white screen and, also the caps lock light doesn t turn when its on, yet it clearly lets me reset the smc, so it is a very strange problem Update I figured out what it was it turns out the wifi/isight cable was preventing startup for some reason with it disconnected it starts up just fine
Of course you’ve tried a Safe boot (shift boot), boot from command-R or diagnostic optical disk (depends on the OS you’re running which to choose) booting from some other volume (install disk or a target booted Mac) Connect to an external monitor. If you see a the same thing you have an on board video problem - many of these trace back to a bad/corrupt boot volume (OS) . A backup/wipe/reinstall of OS often solves those issues. If this answer is acceptable please remember to return and mark it accepted.
