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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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... -
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... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
Hello, I have an asus Z97-A motherboard and it doesn't start which was working properly before, the problem isn't related by ram, ram slots or psu (I changed all and nothing work), the exact problem is when you switch it on , it starts and after 1 seconds (no boot or display picture) it's off and then on cycle continuously until you power it off from psu also it's responding to the power switch for turning it off if you keep pressing it 3 or 4 seconds (power button pin has 3.3v) , also when you start it with eatx 12v socket connected this is happening (power cycle also all voltages are resetting... -
Hey All,
I have a Sony 65x900f that I purchased cheap because of a no-power issue.
I assumed that because there is no standby light visible, it would be an easy fix - however upon opening up of the unit I can confirm that the 3v3 standby voltage is making it's way from the power supply to the main board. I'm a little confused as to why there is no standby light.
I am firstly wondering if anyone has this model of TV, or has worked on one and can give me some insight. I have tried to find a service manual for this model, to no avail - and would really appreciate...
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