Hello, I came to learn about bios dumping/flashing.
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Здраво свима,
ја сам заљубљеник у електронику и хобиста који ужива у дијагностици и поправљању лаптопова и другог хардвера у слободно време. Не радим ово комерцијално – само учим и обнављам ствари из личног интереса и забаве. Петљао сам са матичним плочама, флешовањем БИОС-а и дијагностиком малих размера, и увек сам отворен за учење од искуснијих чланова.
Драго ми је што сам овде и радујем се што ћу допринети где могу!Comment
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Hola a todos, soy nuevo en el foro, me presento, mi nombre es Christian, técnico en computadores, laptop, celulares, impresoras, cctv, redes, llevo en el negocio más de 10 años el objetivo de entrar es para proporcionar información, e intercambiar archivos con otros miembros del foroComment
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Good evening (here in Venezuela) I am an electronics technician. I repair PCBs in air conditioners and washing machines. What I like most is repairing motherboards in laptops and PCs. The same thing happens to me. I have had to delve deeper into software since there are more software damages than physical damages. I hope to provide solutions to the best of my knowledge.Comment
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Hello everyone,
I always liked digital design and circuitry courses at University. However, my career took me to managing IT/IM teams. I hope to learn more about electronics.
Cheers.
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Hello World,
I would like to participate in this forum!
I am about to repair for the first time a GPU, a GTX 750 Ti. I replaced shorted high side mosfets twice, but the mosfets keep failing if the 12V line has more than 10V and 500mA. So I suspect that the mosfet driver needs to be replaced as well. Otherwise I can't see much else that could be wrong. There are no other shorts it seems. Although next to the mosfets there is a 3 pin transistor / diode (?) that I desoldered next to the mosfets, of which two pins connect to 12V. The third pin connects to the fan header via an inductor. I guess its not important as long as nothing is connected to the fan header. I can't see anything obvious conncting to those 12V pads of that transistor/diode other than the 12V rail. Resistance of 3.3V and 12V to ground is very high when the shorted mosfets are replaced. Resistance of gpu to ground is 10 Ohms and ram to ground is 100 Ohms. I hope I can find a replacement for the mosfet driver. Wish me luck
Best, JonComment
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Hi everyone! Nice to meet you all. I’m a Technology Specialist with over 17 years of experience in the tech industry. I’ve worked extensively in IT infrastructure, networking, IoT solutions, and electronic systems integration. I’m passionate about troubleshooting, improving system uptime, and finding smart, efficient solutions to technical challenges. I joined this forum to connect with fellow tech enthusiasts, share knowledge, and learn more about electronic repair techniques. Looking forward to collaborating with you all!
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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... -
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Channel: BIOS Requests ONLY!
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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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