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Thanks Duke.

is definitely 3 beeps repeating. 3 long beeps then 3-4 sec gap then same again

got a 820-3209 MacBook Air. Doing the 3 sos beeps. Ive spent 30mins measuring all the power rails for ram.. all there. Is this a common problem? I'm stuck again sorry hence the post.

Good thread!

can close this. I fkd the board good and proper. Made a fire

hey guys. Been a while since posting. Must of learnt something! Am now stuck on a old 820-2580 board. Seconds away from giving up and this post is my last resort. PPBUS_G3H is not holding and is always changing values. From around 8v to 12.6v. F7040 is fine and I even changed U7000 off a...

Siiiiick fixed it duke!! Found a track on sda line that was inconsistent in diode mode. Made a jumper voila!! Happy days! Really appreciate it again!

Need finer tips for my multimeter I think really having trouble measuring pin 17 and 18 of u7100. I didn't trust my first reading. Haven't been able to recreate it and now it seems there is no resistance at all between pin 17 and 18.

Thanks mate. I'm in diode mode and when put on pin 17 and 18 of U7100 I get 0.745 (that figure seems wrong so am going back to test again) Pins 4 and 5 of j6950 both show 3.4v

Got a 820-00164 liquid damaged laptop off eBay that I'm trying to fix now. Super close to completion but of course I'm stuck somewhere. Laptop was sold not booting liquid damaged as is. I have it booting again and when connected to charger it now works perfect however it will not see any...

Bloody excellent! Screw was missing. Took one out another and fixed! A fkn screw tho..... Ffs. You sir are a bloody legend!

I'm stuck here. I don't know what to measure. Got a 820-3462 board with not a sceric of water damage to be found under the microscope. Laptop works fine on cord but battery is always showing an X. Tried a new battery and a working second hand battery. Same prob. Power rails exist obviously...

no corrosion anywhere I could find under scope. After looking at the schematic though and having fixed another one recently the same way I came to the conclusion to change the lcd cable on this one too. Low and behold problem solved. Second time an lcd cable has fixed something. Really confused...

Laptop would power on and got a screen on external monitor. No screen on laptop and no trackpad but keyboard does smc resets. Started measuring power rails, found pp3v3_s3 is only 1.5v wherever I measured. Obviously. Ended up at R7811, looked shit. Changed it. Laptop worked screen came on...

Thanks again for putting up with me and trying to help out. Appreciation to the max! In diode mode Pin 1 05.73 Pin 2 05.70 Pin 5 05.70 Pin 6 05.70

Hey guys, bought myself another laptop to try and repair. Board doesn't chime, found some corrosion around u6100. Have my important power rails and have green/orange light on charger. Removed u6100, pads still ok put it back on as have nothing to change it with. Same readings before hand and...

For fuck fucking sake. It's fixed. These things don't chime when you turn them on. Have tested on 3 others now. My problem was the lcd cable. I changed lcd cable. Still didn't chime. Swore a few more thousand times looked at laptop and low and behold. It's fucking working. Perfectly. Thank...

R6110 r6120 test fine. I found that I do have: Spi_mlb_cs_l Spi_mlb_clk Spi_mlb_miso Spi_mlb_mosi Spi_cso_l There were a couple other spi lines I can't remember as well but no problems found. Thanks for your time here though!

Giving up. Repairing this is beyond me it seems. Gonna eBay the board as is with NFI what's wrong.

I'm in Australia. Really tossing up using the credit card to get over and do the same! Happy learning!