820-3476 Doesn't sense battery.

gcain

New member
Unfortunately no history, customer bought the laptop cheap thinking he could just swap out the battery.

If I unplug the power it tells me the battery is low and it will sleep soon. Coconut doesn't see the battery at all.

Considering it technically can run off the battery, I'm looking at the data lines.


D7050::1 = 3v08 - 3v3
D7050::2 = 2.189

R7050 = ok.
R7060 = ok.
R7150 = ok.

C7050 = ::1 2v2
C7060 = ::1 2v2
 

gcain

New member
I redid the soldering and all looks okay.

There is no draw now though. The adapter is only giving 0.5v.

All fuses look okay. I haven't seen this before, any suggestions?
 

larossmann

Administrator
Staff member
yes, as long as it says ISL6259AHRTZ on it. and agreed with duke & aprendiz that this must be fucked up soldering or something else knoccked off as it was working before.
 

gcain

New member
Thanks, I'll swap it shortly.

Soldering the first time round a bit rough, but the second time was pretty solid. ISL came off a donor board though so I'll try one I know worked before looking further.
Thanks again.
 

gcain

New member
Swapped it out again, soldering is definitely ok this time (no really, I swear).

What does it mean when there is only 0.470v on PP18v_DCIN_FUSE?
 

dukefawks

Administrator
R7012 is supposed to be 68K, so 61K in circuit is 99% probably fine.

Looks like adapter is shutting down or not turning on. Do you have a fake adapter to test with?
 

gcain

New member
You're right.
I must have had the wrong PDF open. :/

I don't have a fake charger here unfortunately.


/taps fingers on desk.
I'll have to try make a plan somehow...
 

gcain

New member
Dead Short. As in 0.000. :/

How do I work out where the short is?
Guessing I remove a component in the middle somewhere and see which side still has the short then repeat?
 

gcain

New member
In Diode mode on R7005;

::1 = 0.000v
::2 = 0.004v

So would this mean the short is on the pin 1 side?
(trying to make sure I'm doing this right)
 

dukefawks

Administrator
R7005 is on the PPBUS not DCIN. But I guess PPBUS is shorted now. Measure in Ohms the resistance to GND on PPBUS
 
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