Chosen Solution
I have a logicboard laying around and would like to test / verify it’s functionality. In my test case, there is following connected to the board:
- Fan
- DC-IN
- Screen-Adapter (for getting some feedback)
- Speaker, left (for getting some feedback)
- RAM (optionally, to trigger “RAM Missing” beeps)
- HDD (optionally, to trigger some Disk-Access) Two things happen, when the Charger is plugged in:
- Fan begins to start automatically, runs continuously. The fan runs quite silent/slow
- When the Keyboard is attached and the power button is held, nothing happens until button is released. Than the fan begins to run at maximum. As I know this from working devices, this seems to be the the step before going to normal boot sequence. Is this behavior already the result of a broken board? Or is anything mandatory missing?
You don’t really need a sensor connected to the board. The replacement heatsinks for my 2009 model don’t come with a sensor connected. You do, however, need a heatsink over the two chips. When I test mine out, I install the bare minimum: HDD, 2gb of ram, fan, heatsink, and connect it to the dc in. Speakers if I need to test them. If I didn’t have a heatsink on, the board would overheat and shut down.
