Undisputedone here, just learning and ran into this forum.
New Members - please post your introductions here
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Biomed here! Been in the industry for 8 years now. Working on devices simple as ECG machines, defibrillators, Patient monitors, Ventilators, Anesthesia machines and lately working on CT scanners...
Trying to get more knowledge on board level repair.
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I am a member of a group of volunteer retirees who rebuild/refurbish donated computers (laptops, desktops, all in ones) and give them free of charge with windows, office, zoom, etc to needy School/College kids, the homeless and folks who can't afford to buy their own. We'll try to rebuild securely erasing hard drives, replacing keyboards, memory...update hard drives or whatever else is needed (we don't replace broken screens. As expected we run into lots of unusual issues, usually software bios/drivers. To date, we have rebuilt over 20,000 computers. I get the tough ones...the challenges. I expect that I'll be using the resources of this board quite a bit since I've now found it. Oh yes...my screen name; that's easy...when I disassemble a laptop and put it back together, more often than not there are two screws leftComment
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Hi guys I'm from the Phillipines and I'm new to this forum happy new year to all of you here.
Now I'm new at repairing laptops I'm just on my own project fixing my brother's laptop a lenovo flex 2 that isn't powering on. now I checked the laptop motherboard visually and I didnt see anything burnt so I checked with a multimeter I plugged the charger the 19 volts is present on the main circuit up to the fuse, now my problem is when I checked for shorts there isn't any but when I checked all the power supply coils it only reads 9v, and I know the 19v is present, what could be the problem i keep scratching my head searching for videos that can help my caseComment
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Ciao a tutti, con la speranza di aprire entro breve un negozio di assistenza, cerco di imparare quello che non so da voi tutti, grazie mille. Buon Anno
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Hello, I'm French, I heard about this excellent forum, I'm retired and trying to troubleshoot electronic devices
I have a Macbook Pro from late 2011Comment
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Hi! I'm from Venezuela, i'm learning how to remove password from bios locked, also i'm learning how to repair by hardware, step by step, till now this is the best forum so i'm here now!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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