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#1 |
Member
Join Date: Sep 2017
City & State: san diego
My Country: United States
I'm a: Knowledge Seeker
Posts: 22
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![]() Looking to fix a Lenovo Yoga 720-13IKB which turns on but wont post.
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#2 |
Member
Join Date: Sep 2017
City & State: san diego
My Country: United States
I'm a: Knowledge Seeker
Posts: 22
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![]() Bump
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#3 |
Member
Join Date: Dec 2012
City & State: Osceola, Indiana
My Country: United States
Line Voltage: [email protected]
I'm a: Knowledge Seeker
Posts: 39
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![]() I have a short measured from a coil and some surrounding caps. So far I am ASSUMING its a 5v circuit.
I have battery charge light. I have battery and power light. Battery charges to full (8v) no problem. Power button responds with power light coming on. No power up from board. What is crazy is I cannot locate the 19v rail in this thing. I know its there or I would not have the other rails. I do have a short on a circuit that I assume is a 5v rail. Short to ground along with surrounding caps. |
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#4 |
Badcaps Veteran
Join Date: Dec 2013
City & State: tunisia
My Country: TUNISIA
Line Voltage: 230V/50Hz
I'm a: Professional Tech
Posts: 481
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![]() No power problem: power button not light; in your case it's power down, it can be caused by a short in cpu or gpu section; or a bad me region, you can try to flash the bios and ec bios first.
the schematic is unvailablle on the payed forum. Last edited by polytek; 03-09-2019 at 04:15 AM.. |
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#5 |
New Member
Join Date: Jan 2019
City & State: Chicago
My Country: United States
I'm a: Knowledge Seeker
Posts: 5
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![]() Hi Guys i have similar problem but i dont have schematic to check all rails is they are OK or Short.
Any update or schematic or at least to tell which rail is short on your board. Thank you ! |
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