Dell n5010 Board statush : Problem dead no Display Come Repair Guide

Dell n5010 Board statush : dead 1st step--- Connect dc Jack and chek 0.30 mili second. Direct 5.012 Iska matlab board full short. 2nd step--- Open laptop and clean motherboard,and I watch allredy another engineer work this board in sb section. 3rt step ---- Chek all section impidance Clr-0.046 Pl4601-0.000 Pl4602-0.000 Pl4901-0.000 Pl4701-0.007 Pl4702-0.007 Pl4703-0.007 Pl5301-0.006 Pl5001-0.008 Bios pin no.8-0.000 Pch cap - 0.003(1.8v) 2nd cap - 0.000(3.3v) 4th step -- I thought this board is fully short,it's non repairable board. But again thoth is board se kuchh sikhte hai. 5th step-- Remove sb section both coile And chek impidance Pl4601(input/output)-0.00/0.00 Pl4602 (input/output)-0.147/0.00 6th -- Again chek clr-0.168 I decide inject voltage 2.3v in sb section output Pl4601 on inject voltage in output section and I found u701 ic is hitting... I will remove this ic and chek output impedance.... Pl4601 output impedance is good 0.367,I'm happy 3v section jinda ho gaya,but 3v ldo still short, I think who section is fully.again some time thinking and I decided standby ic remove and again chek 3.3v ldo section is ok.i am very very happy ki mera pch bhi ok hai. But 5v section still shorting. 7th step -- Inject 3.3v on pl4602 output section and chek any clue, after inject 5sec voltage I found pu5001 ic is very very hitting, agin remove this ic and again chek impidance pl4602 output section is good impedance5 0.325. 8th step-- Again chek all section impidance All section impidance is good,and clr impidance is also good 0.457. 9th step--- All new ic fix in motherboard,and chek impidance all section, all section impidance is good,and connect dc and chek 0.30 mili sec 0.026,0.017,0.008.... 10th step -- Finally given 19.0v by dc. My board is on and amp.0.008,0.360,0.0758,0.950 and display is came.