the Benninger
Senior Member
"ready to enjoyed"
Last Activity: 06-12-2025, 01:18 PM
Joined: 11-24-2022
Location: sao bernardo do campo,sao paulo ,Brasil
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In other tests, I found that the diode PD501 has a leak; I will look for a replacement. I can read that it has the markings P60/28. -
FDI55 LA-J081P schematics and o boardview
hi folks, requiring the schematics or the board view of this board. Initially, the PU301 was overheating, power supply enter protection mode upon reconnecting the charger. I replaced it, it doesn't overheat but it also doesn't turn on.
PD I took measurements and attached them in the circuit image, it indicates that it would be 5v and they are not being completed if I am wrong. ... -
hello I bring news around here, replace the PU301 in addition to PQ1, the new thing is that it is no longer heating, but the machine still does not turn on, not even the charging LED
I made some readings that I attached in the image, when I made the mistake of incorrectly bridging on the coil (PL301) is when I immediately lost it, so the question is do you know which other component suffered from this?...Leave a comment:
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happy start of the week
something happens that I don't know if it's normal, when the reading started (38Mhom) it increased until it reached 60Mhom, in a span of 1 minute. I think it would have continued to increase if I hadn't lost connection. It's difficult to keep the test probes on the pins when it's disassembled due to the shape and size.Leave a comment:
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disassembled or out of the motherboard the readings were as follows
Source/Drain=72k
Source/Gate = 750M
Gate/Drain = 1050M ...Leave a comment:
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I have no way of knowing if pq1 is good or not so I have made the decision to change it, while the resistance PR1 is at its correct value, which leads me to think that it is pq1 that causes the source to disassemble when reconnecting.
If you have anything else to add, I would be grateful; if not, we will just wait for the arrival of the components....Leave a comment:
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Now the one offering apologies is me, I was working on the bottom side, when I looked at this part that you pointed out, I noticed the marker that is above PQ1 and not in PL3. The aggravating factor is that it was on the inductive coil PL301 on the bottom side, regarding the resistor PR1=33.2 ohms on my multimeter
the measurements of PQ1 are
Source/Drain= 65.2k
Source/Gate= 12.48k
Gate/Drain= 73.5k...Leave a comment:
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To try to help you, we need you to make a backup of the BIOS as it is currently, from that we will find a way to help.Leave a comment:
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some information add...
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There is no problem, it was a small misunderstanding, I am not blaming you, do not perceive bad intentions in what you have said, I am more interested in successfully concluding the repair, life is full of stumbling blocks, the important thing is to go through them and learn.
to those that bind us, it will be enough to replace the PU301, I also cannot locate the PL3 on the board, there is no such signaling on mobo
I am already buying the component Sy8286brac (Qfn20)
I would arrive between Thursday and Friday of this week, and I clarify one thing: I am from Venezuela with Spanish...Leave a comment:
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For today, we will leave it here.tomorrow we will see what we can resolve.Leave a comment:
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I made the bridge as you indicated, and at the moment of connecting the charger, I knew something went wrong.
I heard a spark sound and smoke came out of the component above PL301; if I'm not mistaken, it's PU301. I removed the bridge, and now this component overheats, and the computer doesn't turn on now. As we say in my country, we've messed up....Leave a comment:
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PSID pin on DC in conector to each side of PL301 (RIGHT SIDE124k) (left side 124k)
PL301 its two terminals 0.2hom...Leave a comment:
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Connecting the multimeter cables gives a different reading on the two components you requested, which are as follows
PSID to GND = 68k
PL301 to GND = 5000k...Leave a comment:
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I try to enlarge the image you show
me and it gets blurry, it's not possible to zoom in.Leave a comment:
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okay PSID to GND = 115k
on PL301 =2050kLeave a comment:
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same thing, going to need the laboardview of this machine and all the information I can get. I'm afraid it's one of those elusive failures that break head. I'm already starting to take values to see where this takes me....Leave a comment:
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I am currently using the client's charger on my laptop and it works normally.Leave a comment:
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I casually use my charger, it's the same machine I use for work, and both chargers are original 65W. This malfunction is really crazy; I've never seen anything like it....Leave a comment:
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Vostro 3401 strange problem charge
if you start the computer with the charger plugged in it charges without problems and everything works as it should
once started, if you happen to disconnect the charger and reconnect it, it stops charging and feeding the computer; it only works with the battery's charge.
This also happens when it is turned off. Do you have any idea where to start looking for this fault? I have already checked the power jack, the cable, and the charger,
but the problem persists.
Dell Vostro 3401
ModelREG P132G
MoBo:FDI55 LA-J081p Rev 1.0
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