Re: Asus FX504GM shorted
Hi again...
I'm very sorry for the long absence - I've been down with a rather nasty summer-cold...
Thank you very much for all your suggestions - I have hade some success removing a couple of parts from my old MSI scrap MB - Hot air blowing at 480°C (max!)...
gustavind
New Member
Last Activity: 09-01-2022, 02:37 PM
Joined: 08-15-2022
Location: south of jutland
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Re: Asus FX504GM shorted
OK - I'll start with the mosfet - as soon as I get this hot air soldereing working!!
... I have tried with RMA flux - 390°C and high air flow - hovereing 3-6mm over a small part for 1½ - 2min and nothing...?
What am I not getting??...Leave a comment:
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Re: Asus FX504GM shorted
Hello again - a short update as of now...
First - I better correct the info on the resistance on PQ21...
PQ21
source (1-2-3) & drain (5-6-7-8) - 0 Ohm
source (1-2-3) & gate (4) - [U]59 Ohm[/U] [B]!![/B]
gate (4) & drain (5-6-7-8) - 59 Ohm
... I'm sorry, my first reading was faulty - I don't know why..?
When that is said - I'm more confident now, that you are both right - One or both of PQ21 and PQ22 has shorted. After reading the excellent thread - [url]https://www.badcaps.net/forum/showthread.php?t=90356[/url]...Leave a comment:
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Re: Asus FX504GM shorted
Thank you both very much for incredible helpfull pointers.
I'll return to the workbench sometime during the weekend, and update as appropriate.
Have a great weekend both of you!!Leave a comment:
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Re: Asus FX504GM shorted
The meter I'm using sets the scale automatic. The readings on PQ21 are all very low, but the readings on PQ22 are:
75300 Ohm
59 Ohm
75300 Ohm
I really appreciate your help :-)Leave a comment:
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Re: Asus FX504GM shorted
Thank you very much for youre reply!!
The readings are as follows:
PQ21
source (1-2-3) & drain (5-6-7-8) - [B]0 Ohm[/B]
source (1-2-3) & gate (4) -[B] 0 Ohm[/B]
gate (4) & drain (5-6-7-8) - [B]59 Ohm[/B]
PQ22
source (1-2-3) & drain (5-6-7-8) [B]75,3 kOhm[/B]
source (1-2-3) & gate (4) - [B]59 Ohm[/B]
gate (4) & drain (5-6-7-8) - [B]75 kOhm[/B]
I hope it makes sens..?Re: Asus FX504GM shorted
...Leave a comment:
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Re: New Members - please post your introductions here
Hi My name is Gustav, and I'm from Denmark. I'm a rather old (just turned 50) newbie, when it comes to repairing circuit boards. I have had my share of phonerepairs (display, camera and battery replacement), and a couple of laptop repairs as well, and now I'm looking into some more challenging projects - projects I'm hoping you guys can give me pointers on here and there :-)Leave a comment:
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Re: Asus FX504GM shorted
Hi
I have the same motherboard- as mentioned above, and it also have a short somewhere. It shorts the moment the psu is connected, activating the auto shutdown in the psu. I have tested the connector and the 4+4 connectorpins on the board, and they are all ok. My question is: Where do I go from here? Knowing that the short occures befor powerup, does that narrow the search down?Leave a comment:
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