today get this one with complete dead condition.3v present on power switch and also on small 128kb chip. when connect with dc power supply the standby current is 0.03a...................any ideas or schematic
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Re: lenovo v460 no power
any body -
Re: lenovo v460 no power
its 5v present? try to re-flash the bios firstComment
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Re: lenovo v460 no power
see if something is getting hot somewhere, standby current is mostly around 0.01 - check around power and charging ic maybe a capacitor or diode is leaking?Comment
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Re: lenovo v460 no power
i do not have the files to flash bios. one chip is 128kb and one is 4mb....Comment
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Re: lenovo v460 no power
last time i try to find out why it did not power up i ended up reflowing and it when back to normal.Just cook it! It's already broken.Comment
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Re: lenovo v460 no power
which chip u reflowComment
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Re: lenovo v460 no power
hahah funny repairComment
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Re: lenovo v460 no power
today done it by reflashing both chipsComment
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Re: lenovo v460 no power
a few days ago I fixed a no power problem reflashing the eprom.Comment
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Re: lenovo v460 no power
Thanks alihomee!Comment
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Re: lenovo v460 no power
Hi !
dead board same model . no power at any coils no 3.3 or 5 volt switch has power .
some power at ec bios pin no 1.
changed tps51123.
u2 SMSC EMC2103 had a HOLE or pop
ThanksComment
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Re: lenovo v460 no power
Thanks alihomee!
display came it was ec bios problem
with your B560 worked in my v460
ThanksComment
it power after
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
I have a lenovo ideapad 5 14itl05, board LA-K321P, That will only power up on Battery only, or with battery disconnected and power adapter only. If battery is connected and usb-c power plug connected. It only works on battery and will not charge. I can however force it to charge by connecting the battery from a disconnected state while the power USB c plug is powering the laptop.
Additionally....to add to this strange situation. The usb-c power plug ONLY works to power the laptop on one side when inserted into the boards power usb c plug. If you rotate it 180 degrees, the board gets... -
hi guys, my motherboard will not start no matter what
when connected to ac power, the battery does get charge, led indicator glows red when discharged and turns white as it is fully charged.
but rest nothing happens no sign of life.
this laptop has one preexisting usbc power issue - so i use DCIN jack for charging my laptop.
with this issue my laptop was unable to power ON only sometimes i just had to wait some time.
but now nothing happens no matter how much i wait/ charge/ press and hold power button.
i have no knowledge of motherboards ....10-20-2024, 02:48 PM
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