I took this motherboard out and it's on the bench now. Symptoms are I get fanspin and blue led light for a second or two and then it turns off, this repeats 4 times and then turns off completely. Any tips on which rail might be causing this?
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Re: Acer 5750 laptop. advice on which rail this fault is
Many, but you can start by see if there's a short to ground .
Make the basic tests : visually inspect all the components .
what about 3/5 v always ! what about 3/5 vs ! -
Re: Acer 5750 laptop. advice on which rail this fault is
mine to and i foundout the pch was extremly hotComment
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Dear all,
I have taken out the motherboard of a Acer TravelMate P214. There is a short to ground on the main power rail (19V). I don't have the schematics or boardview for this board (DAZ8IMB1AA0 REVA). But I have found 4 MOSFETS close to the main power rail : 2 N-Channel and 2 P-Channel.
I have checked resistance across each of the 4 MOSFETS. I have the following readings:
Both N-Channel Mosfets: nothing odd
P-Channel MOSFET number 1:
source - drain : 117 kOhm
source - gate: 96 Ohm
gate - drain: 117 kOhm
P-Channel MOSFET... -
Hi, I'm Daniel, and I'm new to the world of repairing motherboards.
I would like to create a table, or more likely a guideline about the voltage rails and their possible resistance rail.
I know that the motherboard design has a very big depend on the rail's resistance, but I would like to know what is the smallest value for a rail that can be acceptable. For example, I heard that some new gaming motherboards can have 0,5 Ohm resistance on the GPU rail, but on an older type, it could be a sign of a shorted GPU rail.
So, I generated a table with AI so I can... -
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