i've seen that the most hot thing is the ram (ultra hot wirth its label that it is like melted!) another strange thing is that, while charging, i can ear like a "click"
i've ordered another ram...just to test...
phantomEVO
Badcaps Veteran
Last Activity: 09-16-2025, 02:18 PM
Joined: 03-14-2013
Location: NY
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i don't know why, but know it's charging perfectly with red light !!!
strange thing is that it's seems it can boot: i press the power button, keyboard lights up with caps led on, .fan spin .but nothing happen. black screen and mothebroard / cpu is super hot...Last edited by phantomEVO; 09-16-2025, 07:04 AM.Leave a comment:
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so, i've temporaly replaced the mosfet with a irf3205
https://www.alldatasheet.com/datashe...F/IRF3205.html
connected the charger only i have had charging led
so i have installed the battery, and press the power button
i have seen white led from the power button,then suddenly i have heard my power supply "switching" and notebook power off itself (ive seen that my power supply was set to 20v 1,1a, so i have think to connect it's original power supply (19v 3,25a) but nothing.
no charging light, no 19v on amp...Leave a comment:
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why do you ask me about this?Leave a comment:
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thank you for your amazing reply!!!
i'm starting to understand how it works...a little bit complicated for me...but i'm trying to understand.
but why don't you take attention to what i have found?
short on pl5301: following the path, i have removed a mosfet (pq5302) and the short is gone...now my problem is to replace it. it is 30v@70a!!!!
do you think that this mosfet could be the reason of the main problem?Leave a comment:
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[help] lenovo thinkpad 14 g6 SEMI-DEAD
i don't know the history of this notebook.
if i try to power it up, i have only the charging led blinking slowly 3 times.
if i connect the power supply with the amp meter, i can see that it switch to 19v and suddenly the display of the amp meter goes off
if i connect the power supply with the amp meter WITHOUT the battery, it remains on 5v but the display of the amp meter doesnt go off -
thank you for your amazing explaination i tought it would work like macbook!
for "b+" you mean the voltage of the battery? or the voltage of the battery measured on board while charging?Leave a comment:
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ok i0ve disconered something .... i have short on pl5301
i've removed the coil and the short is on the right side (pin 1)
this side is connected to 2 mosfet and charger ic....now??
removing mosfet pq5302 the short is gone...should i replace it? its is an n-channel 30v 85a mosfet...should i mount the same identical?Last edited by phantomEVO; 09-15-2025, 12:33 AM.Leave a comment:
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even with another pd controller, i have the same behaviourLeave a comment:
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25kLeave a comment:
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all measurements done on pd controller no shorts on the pd controller
with vin3,3 i mean vin_3v3...Last edited by phantomEVO; 09-13-2025, 10:09 AM.Leave a comment:
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Thank you...so ..what could be the next step?Last edited by phantomEVO; 09-13-2025, 08:03 AM.Leave a comment:
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hi reformat thank you for your answer...
i don't know what is a nvdc power supply
battery has very very low voltage
on the pd controller i have
5v ON DOCK_VBUS20
0v on Vin3,3
5v on Charger in
3,3v on Vcc3 Ldo
now what can i check?
Thank you...Leave a comment:
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[help]lenovo thinkpad 16s gen 2 TOTALLY DEAD
Hi to all! thinkpad p16s gen 2 totaly dead. i have only 5v on both ports.
pd controller is tps65994
i don't know where to start: could you help me? thank
Schematic & Boardview - https://www.badcaps.net/forum/troubl...atic-boardview
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