Lenovo Thinkpad L530 No Power Problem. Connect with adapter and adapter light goes out. 19V line is short. I do not have schematic of this model. So i remove PR4002 Resistor (Fig-1) and connect with DC Power Supply to find short (hot component). Found shorted Capacitor near CPU and Replace with good one. But when i connect with adapter, it short again. Found Other capacitor near CPU short again. So i check Capacitor (Near CPU) with Multimeter and found 19V. When i connect Adapter (or) Power Supply, 19v is also here in CPU Supply Volt line (Fig-2). I think CPU Supply Volt may be 1V or nearly. But in this laptop 19v is there in CPU Supply Volt Line. I don't know Why? Please help me to find this kind of short.

Fig-1
https://drive.google.com/open?id=16UWvg ... TPJ1DD28pR

Fig-2
https://drive.google.com/open?id=12eOWh ... RTBV9gHiyf

Lenovo Thinkpad L530 (A)
https://drive.google.com/open?id=13hkrq ... VDW56yoiEJ

Lenovo Thinkpad L530 (B)
https://drive.google.com/open?id=18Q1-l ... 1uGeYUqjzl

check upper mosfet`s in cpu power (pu4301 pu4303 ?).

First of all, thanks for your help. I found bad mosfet (PU4301). But i do not have this type of mosfet. So i tried to replace with some N-Channel mosfet by wire connection. Now laptop is power on but no display. CPU Core voltage is ok (about 1.1V). But a few minutes run replaced mosfet is so hot and wire connection is loose. Any short remain on motherboard? Or need to replace same type of mosfet.


https://drive.google.com/open?id=1-j0dT ... a7vN8yiSxY

https://drive.google.com/open?id=1OemCV ... _DJgwvT1AB