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JohnB8812 Just managed to get in touch with the customer, he "claims" he has dropped it twice from a low level onto carpet. Last time was about 18 months ago. Dont know if that has any bearing on the diagnostics.

Very quick question, not seen this before, searched the net and after doing the SMC reset, same problem exists just need some advice before I make a report to the company that potentially is buying it in. MBA A1370 mid 2011. Battery indicator and in system info show 40 cycle count and service...

JohnB8812 2informaticos PM_BATLOW_L= 0.036v SMC_ADAPTER_EN= 3.411v PM_RSMRST_L= 3.303v SMC_ONOFF_L= 3.412v PM_SLP_S4_L= 0.001v steady PM_PWRBTNL_L..... did you mean PM_PWRBTN_L? If so I get 3.383v

JohnB8812 PPVRTC_G3H= 3.356v SMC_PM_G2_EN= 3.436v

Hiya, as an update, if it helps, I have followed page 62 of the schematic down and below are all the voltages of the first line of all the power rails. PPBUS_G3H= 8.641v PPBUS_S5_HS_COMPUTING_ISNS= 8.639v PPBUS_S5_HS_OTHER_ISNS= 8.639v PPDCIN_G3H_ISOL= 16.909v PPDCIN_G3H= 16.913v PP3V42_G3H=...

Hi all. Not posted for a while as I seem to be getting on OK with the logic board repairs. However, I think I am not seeing the wood for the tree's. I am searching around and losing track of what, where, why and when. MBA A1466 820-00165 Magsafe- Green to Orange- no power on- no fan spin...

Once again... You Da man 2informaticos. Even though all 4 connectors look fine the charge ribbon was the fault. Replaced this then I got the green LED changing to orange. All charges OK, powers on OK. Fans running at a sensible speed . Just goes to show, even if it looks good it may not be...

Morning all.... as usual, I am stuck. So, MBA A1466 820-00165- liquid ingress. Initial presentation... no boot, no power, no magsafe LED. Opened up, JTAG corroded- removed- pads cleaned. U5110- corroded- removed, pads cleaned, U5110 put back on from a donor board. I now get PP3v42_G3H and...

with U5110 not in situ i get a steady 3v. as soon as u5110 goes back on I get 0.02v on smc_reset_l Please can I confirm the dsignations of the 2 caps you say to remove... I can see C5021 on the board view but not C5026

C4836 is replaced. Removed U5110. pin 8 good meter shows O.L is cont mode. In diode it shows -----. cheap meter now shows 558. S just in case I put another ( 3rd one) U5110 back on. both meters show the same as what is in this post, so i suspect the previous U5110 to be iffy. However, still no...

Thanks for the quick reply. Def not got 3v at pin 8. track pad is disconnected as logicboard out of the machine. removed C4836. As you know my highly advanced ISO-TECH IDM 505 meter has an issue with reading in diode mode but the crappy meter shows 0010 with c4836 conncted and 0004 with it...

In addition, the above u5110 readings are with the component removed.... readings with the componted in situ are:- Pin 1 -3.42v Pin 2 -0.0v Pin 3 -3.090v Pin 4 -0.0v Pin 5 -0.0v Pin 6 -2.998v Pin 7 -3.316v Pin 8 -0.002v Don Anton has now marked his issue as solved and I have just carried out...

Hi all. There is a simiar post up in the last 5 hours by Don Anton but I do not wish to hijack his one. However I have a similar problem but with slightly different circumstances.. Above mentioned logic board. Corrosion on U5110/ C5120/R5127/C5101/ C5126 and the area around...

2informaticos i have drpped you a PM.

F7040, pin 2 shows. 0.0 ohms in diode mode and 0.0 ohms in resistance mode. this is with the fuse removed. when i remove D6905 the short on pin 1 disappears. pin 2 of f7040 is tracked to pin 1 of D6905 via a resistor R6906. There is no short to ground on pins 2 and 3 of D6905. I have replaced...

TBH, first time I have seen not to inject voltage.... so in my defence... thank you for the warning. Right.... F7040 removed. Pin 2 still shows a short using diode mode. pins 1 and 2 on L7030 still show 1.3v. Pin 1 on D6905 shows short. pin2&3 do not show short. If I remove D6905 the short on...

BTW, shou;d add, the board has been left in the MBA over night all connected and when i cam in this morning the LED was still orange and the battery had not charged... not sure if that is significant.

Now I know I am going to get ribbed... so here goes. I am trying to deduce this with through logic but not getting it right, i don't think. Above board.... magsafe charger goes from green to orange... indicates PPBUS_G3H and PP3v42_G3H is present. Hopefully I have that right. Board is not...

wow, now i know what it is... i have loads, i have a lot of LA-9431P boards from dell e7450 and pd3 is the same bas40cw. fitted it to the lenovo board and its up and running. Once again sir, I owe you....thank you very very much

Yep, it does.... :)