I’ve replaced bq and the cap circled in red is the only one in the area that doesn’t give me any readings in resistance and also beeps on both sides in the diode setting on my multimeter.
Does anyone know if it’s low impedance or if it’s shorted. Any other places I can look on the board if it is shorted?
Around 120 ohm is normal since you have a diode next to the inductor on your board
after shelving this for a bit i went back to work on this last night. ended up tracing it back to the max 77812 chip which i pulled and the shorts were removed. after replacing it they were back.
does anyone have any insight?
Hey,
For future reference, provide your actual readings (in ohms) in cases like these. I see you mention that diode shows something but resistance not (I’m assuming your measuring relative to ground), which doesn’t make any sense 
as it would seem based your later findings your likely had a short to ground on your SYS rail. Maybe your using a manual ranging meter and had it set to the wrong range(?)
Anyway. presumably your short was sub typical (with the diode present) on SYS, the Max 77812 (CPU/GPU reg) primary VIN is SYS, hence why the assumed short on this rail. Reason I mention that it would have been nice to know your reading on this rail prior is just to confirm and to rule out other potential intermittent issues (such as bad caps etc) or in case your chasing a rabbit as you have the diode present (the 120 ish ohm which @jkyoho mentioned which as he said is normal) 
Well done for presumably finding the problem though. Hopefully a new IC will solve your problem 
I’ll go back and check the ohms. Been a crazy house and I only get a little bit of time to check.
When checking the ohms do I leave a probe on ground as if im looking for shorts? I’m still fairly new to fault finding. Done ports on consoles and thought I’d take on a challenge on a free console.
Haha, I hear ya!
Yeah generally speaking. And black probe on ground when in ohms for the most part unless your looking for something specific.
btw any signs of corrosion, damage / chips/nicks at the Max 77812 ?
No corrosion. Didn’t see any damage to it. When I get back to it I’ll take more pictures.
YES, ohm reading is black prob on ground(say port metal bracket), and red prob on the component you are measuring.
Just for reference, v2 vsys/big 2R2 inductor resistance to ground without diode next to it is around 100kOHM to Mega ohm range, where V1 board is about 10k ohm resistance range(0.4v ish diode reading).
I don’t have a v2 board by hand having diode next to inductor but from my head. From memory with diode v2 board the Vsys/inductor diode reading is around 0.100V and ohm reading should be less than 200 ohm, My multimeter beeps when resistance less than 300ohm in diode/beep mode.
So after awhile of being away I finally got around to this project again. I checked the one cap in ohms and it was reading between .6 and .9
L
be specific. which one, show on picture
At the top of my original post there’s a cap with a red circle around it
