Hi im Sarce
New Members - please post your introductions here
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My name is Allan and I've been doing PC repair for ~30 years. Board-level repair is a very new thing for me, but I've seen too many $2000 devices fail because of a replaceable capacitor and I want to change that.Comment
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hey all. thanks for having me. i love modifying electronics to do more than is intended, which is PRECISELY why I need some schematics!! hahComment
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Middle aged nerd from europe, always having tinkered around with things. Learned electronics in younger years. Can quickly get my head wrapped around things. Broad knowledge, sometimes not too deep.Comment
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I am a computer and digital product repairman, often have to deal with some circuit problems, found this novel place, I need all kinds of technical information, this community information is a very good technical support and a good place to learn technology.Comment
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Since this is required - I may as well introduce myself here.
This is usually not my thing but here we go.
I am an electronics hobbyist, tinkering around with mostly microcontrollers.
At work, I am a forensics examiner specialising in mobile devices. Recently I got a Macbook thrown onto my desk, so this is what I'm doing now I guess.
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Ahhhh...the memories......
I still have two C64s. I think I'll go looking for them. Maybe play some Mail Order Monsters or M.U.L.E.. :roll:
"Its all about the boom....."
Guns kill people like spoons made Rosie O'Donnell fat.Comment
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Hello everyone,
My name is Lyson Mwale. I am from Malawi in Africa.
I am a computer Technician specializing in hardware and software repair.Comment
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Known as Martpeck. Started with Rockwell AIM65 in the 80ies.
Lots of PC Mainboards seen. Soldering hardware skills down to 1.27mm, below I am going to talk Billingsgate...
Loved Thinkpads when they were produced by IBM. OK, Lenovos today are still fine, from time to time resorted/resorting to HP laptops.Comment
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by fredyjbiplease help friends thinkpad T470 board CT470 series NM-A931 error post "bottom cover tamper detection error"
I've already
flashed the bios clean me and updated from the Lenovo site, then removed the switch and immediately jumped the S3 from pins 1 to 4, 2 to 3 but the problem remained the same, thank you1 Photo -
by fredyjbiplease help friends, I have 3 T490 units with the same case, the USB type C is completely dead, showing 20v 0 amp, loss of voltage VINT20_IN resistance to ground is fine, thank you
I think the problem is that I lost the voltage at PQ0008 pon 1 -PWRSHUTDOWN which should have been high which was picked up by R9512 VCC3SW, thank you very much for your help
PF0002 20v
PQ0005
pin 5 20v
pin 1.2.3 19.8v
pin 4 19.8
resistance
source & drain 2,4 m
source & gate 100k
PQ0006
pin 1.2.3 19.8v
pin 4 19.8v... -
by fredyjbiplease help friends x1 yoga 7th no display beep melody thank you...
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Channel: BIOS Requests ONLY!
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by fredyjbiplease help friends clean me bios x1 yoga 7th no display melody beep, thank you
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Channel: BIOS Requests ONLY!
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by fredyjbiPlease help friends, thinkpad t480 nm-b501 is dead, help me fix it, thank you
usb meter 20v 0.00 amp, after I took the VSYS measurement the drop was only `9.2v which should have been 10.2v I measured from a normal matherboard machine, the VSYS path resistance to ground diode mode is 1900 thank you
LINK to Schematic -> https://www.badcaps.net/forum/troubl...b501-schematic - Loading...
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