samstown
Senior Member
Last Activity: 04-10-2025, 02:16 PM
Joined: 03-29-2021
Location: Near the alps
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thank you ! -
It was the backlight chip causing the problemLeave a comment:
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thank you. I wll check that.Leave a comment:
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Can't find schematic here. i'll keep searching.Leave a comment:
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I see 20.4V going to a little cap or filter and nothing on the other side....
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Thank you for your answer.
Drain to GND = 50 Kohm
Gate and Source to GND = OLLeave a comment:
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No power - Mosfet ? ? on Lenovo - IdeaPad 3 17ITL6 - Motherboard HS760 NM-D473
Hello
I've got a Lenovo that stopped working. No sign of life at all. I was hoping it would be an easy fix but I am not sure it's mosfet, I think resistance should be low but it's OL.
Thermal camera show MOSFET heartbeat.... It's Sinopower SM4377.
Thanks
Sam...Last edited by samstown; 08-12-2024, 08:16 AM. -
Someone helped me on another forum
[url]https://www.ti.com/lit/ds/symlink/tps51275c.pdf?ts=1723103728523&ref_url=https%253A%252F%252Fforum.hddguru.com%252F[/url]https://Someone helped me on another...com%252F[/url]Leave a comment:
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Help to identify burnt IC on HP Motherboard L75365-001
Hello
I am trying to identify this burnt IC, looks like QFN20. The motherboard is starting for a second then stops. This occured after a lignthing strike in my area.
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C2954,C2952 and the little one next to are short to groud. I don't want to touch anything before I am sure where is the culprit....
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Apple 076-00236 Genuine Apple Data Migration Tool for MacBook Pro 2016 2017
Hello,
This special tool from Apple is used to recover data from Macbook A1706. I've been using it for a while but it stops working. When connecting Thunderbolt 3 between the tool and working Macbook, Macbook should prompt "new device detected, allow or not"... but it doesn't.
Has anyone ever experience this ? It's not a cabling or power supply issue, some IC have stopped working but not sure which one. Probably the one that manager thunderbolt 3
Thanks
Claude... -
Thank you for all your help. I had two of those. Following your instruction, I was able to fix the second one, the issue was on the Wifi module, the chipset was getting hot. I remove it and now it boots.
I will try to place back the resistor one the first one tomorrow morning.
Have nice end of day and thanks again.Leave a comment:
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resistor in red was getting hot. I removed it but short was still there. I removed the litle cap, not the big one. short is gone, I measue 0.25 when set to 20K. Device doesn't turn on, still 0V on VCC on that spirex chip PIN 16...
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Thanks. If I set to 20K, I get 0,00Leave a comment:
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It looks like a short to ground....
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Hello, thank you very much for your reply and your help.
You are right, VCC is shorted to ground. Should I try to inject 1V on SP3232E Pin 16 and look for heat component with thermal camera ?Leave a comment:
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Hiopos - Cash Touch - Doesn't turn on
Hello,
I have this Hiopos Cash system running on android that stopped working without notice. The power supply is ok, there's light on motherboard but when pressing power button it doesn't turn on.
I've google for schematics but no luck. Motherboard is S2802_V1.3B. I've took some measure and maybe it could be a transistor, the one I am pointing on with the orange arrow on the pics. Does anyone knows this board ?
Thanks
Sam... -
Nice one !...Leave a comment:
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Hello,
I have CH341, that was my first one. Then I had RevealProg, it's very good but fragile.... and now RT809F, this one is really really good and stil cheap.
I am happy to try again if you think there is a way.
Thanks...Leave a comment:
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I've tried again. I've flash orginal ROM and the two modified ROM I got on this forum.
Surface Pro 7 model 1866 SN059810502053
Same, logo...3 seconds and black screen. Here is the sequence.
122: UniqueID:0x201A5800150420EB
123: Start writing chip......
124: Auto erasing...
125: Erase successful,Elapsed time:36.14 seconds.
126: Start writing...
127: Write successful,Elapsed time:69.83 seconds.
128: Auto verifying...
129: Verification successful,Elapsed time:15.41 seconds.
130: Status register1 values: 0x0, Status register2...Leave a comment:
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