Well here it is, many people hinted around it, and got really close:
Your eyes.
Now, nothing against blind people, they gotta be the most versatile people I know, but if I lost my sight, you might as well dump me off the bridge. I would be lost.
Here is an example...
I was given 2 X 27" iMac computers. They would not turn on. Dead. AppleCare could not repair them is what I was told. (It may not have been WORTH it to repair them?) They are i7, 8-core, 8GB absolutely HUGE computers. Everything all-in-one. Except the keyboard and no mouse which were not included. Dead as a turd.
OK, so Apple could not or would not repair them, they must really be bad. So I plug them in. Dead. Nothing. So I take one apart.
It is pristine inside. Just a trace of dust in the fans. I am looking for something obviously broken, but I see (using my eyes) nothing. Everything looks fine upon initial inspection.
So I delve a bit deeper and pull the power supply board. 2 connectors (input and output) and 4 screws. Again, very clean, no dust. Lots of surface mount stuff, a few caps all look good, inductors look fine, transistors and heatsinks all look clean and generally everything looks new. So I have this 8X loupe that I use for inspecting for solder cracks and other small stuff, and I am scouring this board for any defects. Looking for anything, like cold solder joints etc.
Lo and behold, while looking for defects, I spy the fuse. It is a square, 6.3A PC mount fuse, and there is a tiny scorch mark underneath. A carbon spot smaller than a bb, slightly larger than the period at the end of this sentence. Only reason I saw it was because the carbon partially covered the word FUSE printed on the board.
So I figure it is time to get out the meter and start checking things, and sure as $hit, it is blown. Guess what. I replace the fuse, put it all back together and it works fine.
So I figure my eyes were worth at least $2K today. Might be worth another $2K tomorrow if I can fix the other one. And no, I will not become an iTard, I already have several Macs that I use. Just another brick in the wall I suppose...
Your eyes.
Now, nothing against blind people, they gotta be the most versatile people I know, but if I lost my sight, you might as well dump me off the bridge. I would be lost.
Here is an example...
I was given 2 X 27" iMac computers. They would not turn on. Dead. AppleCare could not repair them is what I was told. (It may not have been WORTH it to repair them?) They are i7, 8-core, 8GB absolutely HUGE computers. Everything all-in-one. Except the keyboard and no mouse which were not included. Dead as a turd.
OK, so Apple could not or would not repair them, they must really be bad. So I plug them in. Dead. Nothing. So I take one apart.
It is pristine inside. Just a trace of dust in the fans. I am looking for something obviously broken, but I see (using my eyes) nothing. Everything looks fine upon initial inspection.
So I delve a bit deeper and pull the power supply board. 2 connectors (input and output) and 4 screws. Again, very clean, no dust. Lots of surface mount stuff, a few caps all look good, inductors look fine, transistors and heatsinks all look clean and generally everything looks new. So I have this 8X loupe that I use for inspecting for solder cracks and other small stuff, and I am scouring this board for any defects. Looking for anything, like cold solder joints etc.
Lo and behold, while looking for defects, I spy the fuse. It is a square, 6.3A PC mount fuse, and there is a tiny scorch mark underneath. A carbon spot smaller than a bb, slightly larger than the period at the end of this sentence. Only reason I saw it was because the carbon partially covered the word FUSE printed on the board.
So I figure it is time to get out the meter and start checking things, and sure as $hit, it is blown. Guess what. I replace the fuse, put it all back together and it works fine.
So I figure my eyes were worth at least $2K today. Might be worth another $2K tomorrow if I can fix the other one. And no, I will not become an iTard, I already have several Macs that I use. Just another brick in the wall I suppose...