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sorry for the delay in replying sir and sorry if my English is not good I use google translate, like this sir I have 6pcs of this board, 1 unit lights up normally only the camera has a problem, 5 units are completely dead, with the same problem - PWRSHUTDOWN is missing 0v, so I took the UTE1B chip from the problematic camera case board and installed it on the board with the PWRSHUTDOWN 0v case, but the result is still the same so I don't think the problem is with the UTE1B chip, what else should I try to check sir, thank you...
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Sir, I tried to replace the UTE1B from a donor with the same board series, it turns on normally, only the camera has a problem, SHUTDOWN (R9515) 3.3v, I have several of these boards with the same problem, thank you very much sir for your interest in helping me...
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sir, I just replaced the UTE1B chip, now VCC3SW is ok 3.3v but PQ0008 pin1 0v lost voltage -PWRSHUTDOWN, R9512 pin 2 3.3v pin 1 0v, the measured resistor is fine 33k even I also tried replacing R9512 the result is still the same -PWRSHUTDOWN 0v, thank you love...
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sorry for the delay in replying sir, because I am in Asia, sir I checked Pin # 43 (3SW_OFF#) 19v and pin VREGIN20 20v, can it be confirmed that the UTE1B IC is damaged, thank you...
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Thank you for your help sir, someone wants to ask, what voltage is needed for the UTE1B chip to produce a VCC3SW LDO, sorry if my English is not good, I use Google Translate...
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sir, that means if the resistance of VCC3SW is 600k, then I replaced UTE1B because it didn't produce LDO, thank you...
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Thank you sir for your help, sir, is it true that the source of the VCC3SW is the CMOS battery
[B]VCC3SW[/B]. meter auto range resistace 550kThank you sir for your help, sir, is it true that the source of the VCC3SW is the CMOS battery
[B]VCC3SW[/B]. meter auto range resistace 550kThank you sir for your help, sir, is it true that the source of the VCC3SW is the CMOS battery
[B]VCC3SW[/B]. meter auto range resistace 550k...
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please help friends thinkpad T490 NM-B901 rev 1.0 dead no power usb type C 20v 0amp thank you
please 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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friend please clean me this bios x1 carbon type (21-CB) SN PF-21RQ94F4 nm-d961 rev 0.2 no display thank you...
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please help friends clean me bios x1 yoga 7th no display melody beep, thank you
please help friends clean me bios x1 yoga 7th no display melody beep, thank you
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Please help friends, thinkpad t480 nm-b501 is dead
Please 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
[B]LINK to Schematic[/B] -> [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/77167-required-t480-nm-b501-schematic[/url]Please help friends, thinkpad t480 nm-b501...
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please help friend extract bios file from website FL1 exe to bin thinkpad p1 gen 3 no display beep melody thank you
please help friend extract bios file from website FL1 exe to bin thinkpad p1 gen 3 no display beep melody thank you...
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sorry sir I'm late in giving an answer, I just tried bios clean me from you unfortunately the problem remains the same, thank you very much sir for taking the time to help me...
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