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820-3115 Does Not Regognize Battery

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dukefawks

Administrator
Check diode mode on both data pins to the battery SMBUS_BATT_SCL and SDA.

Battery indicator disconnected to rule out that is giving issues? R5280/81 checked?
 
H

handydandy1971

New member
Replaced U7000 Again and I am getting 3.4ohms on Pin 17/18 now...I have a Green Light on Charger But it Still is not recognizing the Battery and I am still getting 12.26v On F7040 with Charger attatched and 11.98v with Just the Battery attached. I Also removed the Rubber Around the Corners of the SMC Chip Cleaned all around the perimeter the Fluxed and heated the SMC...I measured SMBUS_BATT_CSL and SDA lines and get 2.39 in Diode Mode...R5281/80 giving Proper Mesurements also. Also I did replace R5087 Prior to getting a Green Light with a resistor that is 470k 5% 1/16w 220 instead of a 1/20w as that was all I had...Could that make a Difference on not seeing the Battery? And last but not least I have Not put C6409 and C6405 Back on the Board yet JUST IN CASE they were the reason for not getting a green light in the beginning...The computer Runs Great off the Charger But still no Battery...I feel like I'm SO CLOSE!!!..lol...Anything else I can try?. Thank You in advance for Your Help. :)
 
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handydandy1971

New member
Thank Tou for the Quick Response Duke :) With the Red Probe on ground and Black probe on Pin 4, Pin 6 of the Battery Connector I get 2.399kohms on each pin with the Multimeter set to Diode Mode?
 
Gurmon

Gurmon

Member
You're measuring voltage drop in diode mode, so it cant be the figure stated in ohms.

Anyway, replace the SMC.
 
H

handydandy1971

New member
Is there anywhere that I can Pirchase a Preballed SMC for this model? I don't have a stencil of Balls...InDO have another 820-3115 Board but I can't renal the SMC chip once I remove it...
 
D

dukefawks

Administrator
Forget about "new" SMCs. Take one from a donor board and reball it. Get the stencil and practice on a few trash SMCs. Use search on the forum there is a link to the Ebay auction for the stencil somewhere.
 
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