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Yes, it's really hard to say😢. It's like killing a patient whom came with fever. Recently, I destroyed another boardðŸ˜. Actually I found the problem and turned on the board. It came with no power and I found problem with RTC section. As RTCRST# was reading 24ohms on SOC side. 20kohms resistor is used to pullup 3.3v to RTCRST#. As we know until RTCRST# is low, Power management of SoC is not going to wake-up. And as it was reading 24ohm, 3.3v on the other side of resister didn't pass to RTCRST# just I saw 0.012v. I thought, at this point 50% of SoC is damaged through RTC section reading 24ohm...
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Sorry, the motherboard was dead. SOC damaged. No use of getting schematic...
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Can anyone post me the model of the charger IC used in this laptop DAG7BLMB8D0 . I received this laptop for repair which was already undertaken for repair and the persin removed charger IC and did not replace, I need the model number so I can replace it...
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Lenovo Ideapad 1501B_01_01
Need Schematic for Lenovo Ideapad 100S 1501B_01_01
Thanks
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Lenovo Ideapad 1501B_01_01 dead motherboard
The motherboard turned on for 3 sec and automatically turned off. All inductor voltages are present in the ram module 1.35v, CPU core, 1.8v, 1.05v, 3.3v, and 5v stand-by. Ampere reading in the DC power supply when i turn on the board is 1st 16mA then to 110mA and then to 250mA, when the board is turned off it goes to 4mA all this happened in 3 sec. When the board is turned off only LDO is present at 4mA.
I plugged out the DC-regulated power supply and did some off-state checking to see any shorts in load switches and then primary and secondary power line regulators and MOSFETs....
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Re: New Members - please post your introductions here
Hi Everyone!, my name is Philip Charles from Sri Lanka, and I'm happy to be as a member in the badcaps.net family. I'm a beginner in computer motherboard repairs and wish to learn more in board repairs related to computers and with this intention I joined this forum. Let's go together to achieve our goals. Cheers!
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