DELL 1540 black screen

[mo000]

hi
inspiron 1540 comes withe black screen and 7beep
first i flash the bios but same problem
then i check CPU vcor
vcor appears but goes off after 5 seconds and mosfets becomes very hot
i check all the mosfets and caps in vcc track no shorts
i change ISL62882 becasue the origin one has damaged pins
but same problem the laptop powe on the cpu becomes hot the vcc core appears but goes off and mosfet on phase 2 becomes very hot .

[mo000]

Re: DELL 1540 black screen

the problem solved
the replacement ic is defective
i return the original ic and solder the missing pins
vcor appears
the laptop works fine now .