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Don't give up too soon
after reading some stuff here at the Forum I noticed PM_PGOOD_CPUVCC shot NOT be present in my case with no PPVCCOPC_s0G present
and the only issue can be a bad solder join at U7100 I don't remember exactly but i think on Pin 48 or on Pin47 so after cleaning...
After replacing the chip still same result 20V 200mA No boot
I figured out that CPU_ZVM_L on U7790 is missing so no PPVCCOPC_s0G for the CPU too
so maybe last option dead CPU ?
feels bad that i fried a working system just by soldering a CD3215 not properly but so far i learnt a bunch off...
Okay i Changed U3200 again and my short on PP3v3_UPC_XB_LDO and PP1V8_UPC_XB_LDO is now gone the CD3215 area is not feeling hot anymore ...
meanwhile i have a hole boneyard with CD3215 chips only from this board ... but its okay its still fun for me to figure out this kind of failure
No on L7210/20 i get 0,0001V so its just tolerance from my Fluke i think so so its basicly 0V there also after 15s
So are the low resistance values of this lanes are normal ? did anyone can confirm this ? or can messure it out on a working board ?
Thank u for u response
I get a bad chipjust aboveY3000 its not shown on my BRD view so i thinks this could be the PI3USB32224 chip it was verry hot too i swaped this chip too
You are right its only one CD3215 at the time getting hot
the tipp with VCCGT is good for me thank you
Hi, I'm currently working on an 820-00840, I bought the device myself with water damage, so please don't be too hard on me if I have done something wrong up to this point, I mainlywanne study this repair matter to get into this
I would also like to apologize in advance for my bad English.
PP3V3_S5: Is pulsing between 0 and 3.3V (maybe I've overlooked this before but I remember 3v3_s5 at L7690 was stable last time I measured it)
i inject 3.3V into PP3V3_s5G but I don't notice a change nothing gets hot at this time
I'm new here and could use a little help.
I have an 820-00840-A board and pp3v3_s5g is not present.
USB-C AmpMeter says 20V and pulsing 6 and 60 mA
The board has no water damage and no corrosion. All components that have to do with pp3v3_s5g look good but I have 0.5 ohms to ground...