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Well it should be 8.6v/8.56v (whos splitting hairs here) - that rail is just used to create the other power rails PP3V42_G3H, PP5V_S5. Post your voltages for the power rails

Just to be clear here what is the defect ... a running booting and working 820-3209 that is booting in the OS but running slow?

Well just tried to send you a pvt message with some beer information - but you have exceeded your "private message quota" according to the ever knowing vBulletin

Good plan, Oh L6995 didn't get burned, well not by any board fault. It got burned by me, well it got heated up then crushed - ham fists

Good shout but the inductor on a 00165 is about 8x too big!

Im looking for a replacement for L6995 on the 820-00840 board. It's specified as 10uH / 1.4amp / 0.4ohm part number - PIYA25201B-SM. I cannot find the exact device, usual searches turn up nothing for a PIYA 2520 1B. Additionally i cannot find anything as small as this device .. The remains of...

Amazing .. a bios flash worked! ... took me way too long to work out how to do this. Wrong tools for the job really.

And for that i'm going to need to spend the ??? (or Euros) on a Medusa -

More fun and games ! Having spent some time with the scope this is where I am. - On start up the fan stutters, makes a spin, stops then starts up for approx 6 seconds. PP5V5_S5 drops to 0v for approx 100ms before raising back to 5.5v - While the system is running for the 6 seconds or so all...

I'm working on a similar problem. Does the fan start smoothly or do you have a stutter? Is the fan spinning at full speed - loud

I wouldn't know I've never fixed a board ?

With regards to rinsing after cleaning. Rinse with distilled water - to remove any cleaning fluid and any water-soluble dissolved contaminants Immerse and rinse in propanol (iso or 1-ol it doesn't matter ) for a short while to remove as much water as possible. If you start with freshly...

Looks like no one got back to you on this... Here are my thoughts No you can't partially fill an ultrasonic cleaner a) it will overheat b) the propagation of the sound wave will be very inefficient to the point where it won't be effective. No, the solution doesn't smell - smells a bit like...

Going through all of this now - I may be a little while. Wish I knew more about the start-up sequence after the S0 state.

SMC_LID is now fixed .. still no change in behavior

Found another area of crud on the board - the hall effect pads. R5250 has jumped off the board. SMC_LID should be high yes ?

Probing on ALL_SYS_PWRGD and CPUVR_GOOD are falling to 0v at pretty much the same time

Hmmm no change ... Q3080 gone and starting in SMC bypass makes no difference. It's running for a good 6 seconds then hard fan stop.

Oh wow Q3080 has disintegrated - ill clean up that mess and report back

So this board initially had corrosion around the Thunderbolt boost regulator L3095 and Q3088. After an ultrasonic the board seems to come to life .. fan spins for a few seconds (between 3 and 5) then it's back into an S5 state. This seems a very different problem to the 1/4 fan spin mentioned...