Hi everyone! I'm new in this forum and i'm from Chile so i don't have experience with Macs and my english is not perfect. I got a 2006 White MacBook Model A1181 (1GB RAM, Core 2 Duo 2.1Ghz.) that doesn't wants to start. I mean. I press the power button and nothing happens! No CPU fan No Lights No Screen Nothing! (I don't have the HDD. My friend, the owner of the macbook is making a backup) I took out the RAM and saw a weird white substance in the connection part (both port and RAM itself). I want to take that strange substance out to see if that's the problem. What product do you recommend and how to do it because it is also inside the RAM slot. I took out the RAM and tried to boot without them. Nothing happened. no reaction at all. The battery charged fine (from 4 lights to 5) conneced to the MacBook. I disassembled the top set to see if it was not a Keyboard-Logic Board connection problem. I disconnected it, blew the connection port and connected again... NOTHING. I also have tested: Reset PRAM Reset SMC (don't remember if the initials are correct) Start with battery only Start without battery, only AC. Start using those two metal spots near the CPU fan that serves as power on button. One weird thing is that when i connect both AC and battery to the macbook, i can hear a very very low ticking (like a clock) like 2 or 3 times per second very close to the processor. I don't have or own any other macbook so i can't test the keyboard or RAM. Please help! It's out of warranty so i don't mind opening it. Sorry for my english. I hope i explained my problem correctly. If you need photos ask me. PD: The macbook doesn't have any liquid spill history so i doubt it's a fried logic board or bad keyboard and it's only 4~5 years old.