Zippo978
Member
Last Activity: 04-12-2025, 02:28 AM
Joined: 02-27-2024
Location: Palermo
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It does not work -
Laptop serial?
LXTZH0300804727FF71601
What else?
For information, I have a bios from a Packard Bell with the same motherboard, everything works except WiFI, even changing the board....Leave a comment:
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Acer Travelmate 5542 PEW56
Hi, I need the bios for an Acer Travelmate 5542.
Main board NEW75 LA-5911P
Rev 1.0
Thenks -
Samsung NP-R540
Hi, I have this notebook to repair but I can't find any schematics, thanks to anyone who has the schematics.
Samsung NP-R540 - BREMEN-VE REV: MP1.1 BA92-07470A -
Telefunken te43550b40q2k intermittent backlight
Good morning everyone
I have this Telefunken te43550b40q2k TV that has intermittent backlighting, sometimes it turns on and then does not turn back on.
I tested the LED bars and all three work, not even one burned LED, then I tried to put only two bars short-circuiting the end of the connection cable and it does not give any problem the LEDs stay on without problems, I also tried short-circuiting the central connector and the initial one, always no problem, but as soon as I put the third bar, no matter the position the problems start again.
Thanks in advance... -
All resolved, a mosfet was faulty.
Thank you for your help and above all for your patience. I learned new things and in the end this is more important than the repair itself. Thanks againLeave a comment:
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You're right, 52 useless posts.
I replaced them and tested them and they worked perfectly, now testing PQ100 and PQ101 again the source and gate are shorted, now I'll change them again and let you know.Leave a comment:
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I found the diagram of the charging IC, PU100, and checking the voltages I realized that the ACDRV(pin4) should be 6V more than the battery charger, 26V in my case, but both with and without battery it is always 20V. I also tried turning on the PC with and without the battery and it works in both cases.Leave a comment:
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I don't have RE4458, but where the tip is I have 2.5V.
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see you tomorrowI don't have RE4458, but where the tip is I have 2.5V.
[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"267","title":"2024-7-12...Leave a comment:
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I noticed that when the PC is turned on with the battery and charger, Windows shows the symbol of the battery charger inserted and says "Battery powered" and the battery does not charge. Can it help?Leave a comment:
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Thanks I didn't know that
QE4402 not present
RE4456 pin1 = 3V, pin2 = 2.5V
+3VLP measured on PU9700 pin5 is present...Leave a comment:
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I don't have PR111 and PR112
[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"267","title":"2024-7-11 18-4-16.jpg","width":"150","data-attachmentid":3307233}[/ATTACH]I don't have PR111 and PR112
[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"267","title":"2024-7-11 18-4-16.jpg","width":"150","data-attachmentid":33072...Leave a comment:
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Ok thanks, that's what I thought, I needed confirmation.
What can you tell me about it?
With power supply and without battery, voltage to ground of pin 5 of the PU100 2.5V.Leave a comment:
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Voltage to ground of pin 5 of PU100 2.5V.
Can you tell me what Batt+ and V9B+ mean?Leave a comment:
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No, only a donor board from which I have already taken some parts is not working, such as the mosfets on the primary and the bios chipLeave a comment:
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Sorry for my ignorance, but as I was saying I just started, I shouldn't find 9V on pin 5678 of PQ102, I understand this from the diagram.Leave a comment:
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I have no measurements on the disassembled mosfets.
On the motherboard without mosfet between Source and Gate I have the same values as in post 25Leave a comment:
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Disassembled and re-measured
S-D = 1.1M on both
I have no readings on the othersLeave a comment:
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