Issue
- Long time ago, I spilled coffee on my laptop
- The laptop shut down right away and I made the mistake of turning it back on right away
- Laptop runs fine when adapter is plugged in
- Battery does not get charged
What I've Tried
- Replaced battery with new one
- Measured adapter voltage; there's 19V coming in
- Measured voltage at DC jack — 19V present
- Measured the voltage at the battery connector; here are the values:
NET NAME | PIN# | V
BAT CON - 1 - 0.76
BAT CON - 2 - 0.76
SMB0_DAT_CLK_CON - 3 - 3.23
SMB0_DAT_BAT_CON - 4 - 3.22
LDO_V3.3 - 5 - 0
GND - 6/7/8 - 0
Additional Info
I have the boardview files for the motherboard
(See first attachment)
I found some schematics online as well
(See second attachment)
Questions
1. Are those the right values at the battery connector?
2. What should I check next?
3. So far I've only been looking for voltage drops (0V); should I be checking for other things like current flow, resistance, capacitors?
4. Does the battery need only voltage to recharge? Does the battery use both current and voltage to recharge? I know there's a chip inside the battery that determines how the battery should be charged so I'm assuming that chip talks to the charging controller on the board and if that's the case, then I should be looking for correct voltage values only and checking for current flow is unnecessary — is this correct?
5. Should I check for blown fuses, bad caps, or short-circuits?
6. Could it be that the coffee deposits contaminated the area where it was spilled and covered some components/paths? There were only a couple of drops that got onto the board; most of the spill was caught by the plastic protective layer under the keyboard.
7. Should I try a software fix first? I could try reinstalling the battery drivers or booting from a linux live disk and see if that will kickstart the battery into getting charged; maybe there's nothing wrong with the board itself.
8. So based on what I've read, the controller uses the SMBus to talk to the battery; that explains the CLK and DATA pins on the battery connector; what kind of data is the controller sending?
Thank you!
- Long time ago, I spilled coffee on my laptop
- The laptop shut down right away and I made the mistake of turning it back on right away
- Laptop runs fine when adapter is plugged in
- Battery does not get charged
What I've Tried
- Replaced battery with new one
- Measured adapter voltage; there's 19V coming in
- Measured voltage at DC jack — 19V present
- Measured the voltage at the battery connector; here are the values:
NET NAME | PIN# | V
BAT CON - 1 - 0.76
BAT CON - 2 - 0.76
SMB0_DAT_CLK_CON - 3 - 3.23
SMB0_DAT_BAT_CON - 4 - 3.22
LDO_V3.3 - 5 - 0
GND - 6/7/8 - 0
Additional Info
I have the boardview files for the motherboard
(See first attachment)
I found some schematics online as well
(See second attachment)
Questions
1. Are those the right values at the battery connector?
2. What should I check next?
3. So far I've only been looking for voltage drops (0V); should I be checking for other things like current flow, resistance, capacitors?
4. Does the battery need only voltage to recharge? Does the battery use both current and voltage to recharge? I know there's a chip inside the battery that determines how the battery should be charged so I'm assuming that chip talks to the charging controller on the board and if that's the case, then I should be looking for correct voltage values only and checking for current flow is unnecessary — is this correct?
5. Should I check for blown fuses, bad caps, or short-circuits?
6. Could it be that the coffee deposits contaminated the area where it was spilled and covered some components/paths? There were only a couple of drops that got onto the board; most of the spill was caught by the plastic protective layer under the keyboard.
7. Should I try a software fix first? I could try reinstalling the battery drivers or booting from a linux live disk and see if that will kickstart the battery into getting charged; maybe there's nothing wrong with the board itself.
8. So based on what I've read, the controller uses the SMBus to talk to the battery; that explains the CLK and DATA pins on the battery connector; what kind of data is the controller sending?
Thank you!
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