Search results

Pin 1 - 484ohm Pin 2 - 475ohm I'll come back to you on this. I'll come back to you on this. With black to ground this is open (checked on pin 2 of F7140)...

L7430 is 125 on both legs L3095 is 500 on both legs L7320 & L7310 are 50 on both legs

L7520 has 420 to ground on both legs L7560 is 150 on both legs...

I've got a 820-3476 which is only showing 1v on PPBUS_G3H and about 300 ohms to ground. There was corrosion around R1410 and R1617 which I've cleaned up and repaired during my first pass over the board, but apart from that it's clean with no other visible issues. Pulled F7140 and showing 12.7v...

Thanks! I?ve not checked SMC_LID, will do that on Monday.

The board is completely stripped from the machine, nothing attached. I?ve swapped for a known good IO board and flex, and I?ve tried it on a genuine charger.

Any ideas, anyone?

History Board came in no-power with minor corrosion on C1930 and R1931. Replaced both as part of the initial clean up pass. No other signs of any corrosion/junk anywhere else. Symptoms Board behaves, randomly, in different ways when power is applied. 1) Powers on drawing either 0.180, 0.200...

No change, unfortunately, everything is as it was reported previously.

3.05v & 3.24v

RTC_RESET_L @ 3.33v Still no signs of life. Perhaps just a knackered PCH?

Looks like R1303 at fault, will replace and report back.

I can't detect anything at all, but that might just be the tools I have access to not being quick enough so I can't be 100%. PPVRTC_G3H - 3.33v PCH_CLK32K_RTCX1 - 0.37v PCH_SRTCRST_L @ 3.33v RTC_RESET_L - 0.00v 3.24v & 3.41v

Re-tested PM_BATLOW_L from a different point with the DC supply and it's fine, it's at 3.3v. I was testing on Q3000 and I think the contact point was too fine for a reliable multimeter probe connection. Apologies.

- It's a genuine cable, which I thought was what was important - It's not been an issue before - At least two other 820-00165 boards this week alone and they've worked fine with this setup - I don't want shitty boards killing ?79 genuine chargers But now that I know there's the potential for...

Replaced R7545 and C7524 to no affect (though certainly R7545 did need replacing. Yes, 0.03v Doesn't appear to. I notice a tiny fluctuation in the power supply draw, 0.79 becomes 0.80 and then drops again. Original genuine MagSafe 2 cable on a DC power supply. No discernible difference...

0.430 0.917v Bingo, looks like there might be an issue with R7545, I'll replace. 0.941v

Meant to say, bench supply is drawing 0.080a.

Apologies if this turns out to be something really stupid, I'm operating on not a lot of sleep here. I've got a 820-00165 that came in, no power. The board is immaculate, I've been over it several times and no signs of any corrosion at all, anywhere. Some readings: PPBUS_G3H - 8.58...