So, I'm still having trouble with the MacBook I posted about here. It kernel panics even more frequently now, a month later, about once every 30 minutes. I'm running 10.5.8 now (no Snow Leopard for me!). Anyway, the problem I'm posting about is that I can't boot into Open Firmware. It works fine just booting straight through to OS X (except about a third of the time I start up it kernel panics right after the Apple logo appears) but it won't boot into Open Firmware. I hold down Command-Option-O-F to no avail and it just won't go. (I'm trying to do reset-all to see if that helps any.) I tried booting into Open Firmware successfully on my other Mac so it's nothing I'm doing, this MacBook obviously has some serious issues. I'd rather not have to take this computer to the Apple Store again - every time I do they just reinstall the system/replace the hard drive and don't take me seriously when I say the problem is not with software. (Plus the warranty on this machine is up now and I'm trying to avoid paying hundreds of dollars!) Anyone know what the issue could be? i really need a new computer hahaha... Oh! I also tried booting into Open Firmware by holding down the power button continuously as suggested here... the on/off light blinked 3-4 times, the computer made a really long beep (like I was trying to do a firmware update), then started as normally. So I don't think that worked either lol.