Hello,
I've been working on this laptop for a few hours and I am stumped. Still learning this kind of troubleshooting. Hoping someone can help.
Computer Information:
Model: Lenovo IdeaPad Gaming 3 15ARH7
Motherboard model: NM-E211 Rev: 1.0
Schematic, Boardview, & FlexBV Free - Attached
Problem:
The computer does not charge the battery or power on also does not power on with power adapter only. Battery have no charge on it at all (reading mV on battery charge). When connecting the power adapter through a USB-C ammeter, it reads 20V and 0.03A. The USB-C charging port is not broken. There are voltages that seem to be missing on the board and others seem to fluctuate instead of hold stable. There is no voltage at the battery connector.
Troubleshooting:
Checked for shorts at all of the large inductors and found none.
Pins 1 & 2 at the battery connector (VMB2) have no voltage when the battery and the power adapter is connected. Both sides of the fuse (PF3000) that is connected to Pins 1 & 2 also read no voltage. Fuse is not blown and neither are the other fuses on the board.
Pin 3 & 4 at battery connector (EC_SMB_CK1_R and EC_SMB_DA1) have 0.5V
VINT20_IN is not stable and reading 3.3V - 3.4V (But shouldn't this voltage be 20V?)
I don't know. If I am reading this schematic correctly, it looks to me like my problem is VINT20_IN is not being created and am I reading that voltage line correctly? It should be a 20V line, right? According to the schematic and my limited ability reading them, it seems to me like UB7 creates VINT20_IN? Is that where I should be looking?
I'm hoping someone can look at this and help me out. I'll be glad to take any measurements you need me to. Thank you.
https://www.badcaps.net/forum/troubl...-intel-nm-e211
I've been working on this laptop for a few hours and I am stumped. Still learning this kind of troubleshooting. Hoping someone can help.
Computer Information:
Model: Lenovo IdeaPad Gaming 3 15ARH7
Motherboard model: NM-E211 Rev: 1.0
Schematic, Boardview, & FlexBV Free - Attached
Problem:
The computer does not charge the battery or power on also does not power on with power adapter only. Battery have no charge on it at all (reading mV on battery charge). When connecting the power adapter through a USB-C ammeter, it reads 20V and 0.03A. The USB-C charging port is not broken. There are voltages that seem to be missing on the board and others seem to fluctuate instead of hold stable. There is no voltage at the battery connector.
Troubleshooting:
Checked for shorts at all of the large inductors and found none.
Pins 1 & 2 at the battery connector (VMB2) have no voltage when the battery and the power adapter is connected. Both sides of the fuse (PF3000) that is connected to Pins 1 & 2 also read no voltage. Fuse is not blown and neither are the other fuses on the board.
Pin 3 & 4 at battery connector (EC_SMB_CK1_R and EC_SMB_DA1) have 0.5V
VINT20_IN is not stable and reading 3.3V - 3.4V (But shouldn't this voltage be 20V?)
I don't know. If I am reading this schematic correctly, it looks to me like my problem is VINT20_IN is not being created and am I reading that voltage line correctly? It should be a 20V line, right? According to the schematic and my limited ability reading them, it seems to me like UB7 creates VINT20_IN? Is that where I should be looking?
I'm hoping someone can look at this and help me out. I'll be glad to take any measurements you need me to. Thank you.
https://www.badcaps.net/forum/troubl...-intel-nm-e211
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