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Repair guides and troubleshooting for the HP Chromebook, an 14 inch HP-brand laptop computer that runs on the Chrome operating system (OS).

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chrome book that's water/sick damaged

Hey all, my brother in law's little one was sick on his laptop so I said I would take alook. I am learning as I go. I've cleaned the board with no luck but these also don't seem to have 2 positive and 2 earth's like normal laptops as they are type C so how would I go about testing the board if I can't find the live. Also in diode mode how much value should a normal resistor have on a board

Thanks all

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1 Answer

Hi @simong93 ,

Are you getting DC-In on the motherboard side pins of the USB-C connector, you didn't say?

It may be easier to try and find the schematic diagram for the motherboard and then try and work out where the problem is.

Search online for (insert motherboard's board number, including Rev. number if any) schematic to hopefully find it.

There are power regulators on the motherboard which may have been damaged so knowing which ones are being used where, would be an asset, otherwise you're just randomly testing components looking for a problem that may not even be at the point on the motherboard that you’re testing.

What does a "normal" resistor mean? Resistors can vary from 0 Ohms to 100s of MOhms. You would need to look at the resistor’s case marking to determine its' value and then test if it is correct, possibly out of circuit. If there are no markings then you will need the schematic to know what to replace it with if it is determined that it is faulty as all you would have would be its’ board designation.

diode test mode is just that, a function of the DMM to test diodes, not resistors. The DMM applies a fixed amount of current to the diode under test and then gives a readout as to the voltage drop across the diode indicating whether it is conducting OK in one direction and not the other (as a diode should) or whether there are problems with it.

Not trying to dissuade you but fault finding in electrical/electronic circuits without the schematic diagram, unless you are familiar with the circuit or the fault is obvious is very difficult and time consuming.

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Thank you for your answer :) I have decided in the end to get the schematic but the only one I have found I have to pay for but needs must and all that, ill have a look and fingers crossed i can come back with some more answers.

I honestly don't know if I am getting current, the charger doesn't seem to have the normal black and red wires rather it has many connections inside of the charger then on the board we have about 10 different contact points so without the schematic its a no go :D


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