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Lenovo S2 notebook is not turn on repair
Machine model: Lenovo S2
Fault phenomenon: standby 0.001 notebook no power on
Maintenance process: a small amount of water damage at the power port did not respond to Switch. It was given to the after-sales department and said it would take 15 days. The version number is as follows:
Lenovo S2 notebook is not turn on repairFigure 1.
No trace of water damage was found after disassembly. It may have been cleaned up after sale. No 3V / 5V / 1.8V standby measurement was found. There was no 3V in BIOS 1 / 2 / 8 pin habitually. Open Xinzhizao Soft to look for drawings and points.
Lenovo S2 notebook is not turn on repairFigure 2.
Lenovo S2 notebook is not turn on repairFigure 3.
Find DC interface without voltage divider, pq2099 pot, directly remove the strong pull low level.
Lenovo S2 notebook is not turn on repairFigure 4.
Lenovo S2 notebook is not turn on repairFigure 5.
Lenovo S2 notebook is not turn on repairFigure 6.
This is the MOSFET, then measure the common point 20V, 3V / 5V / 1.8, turn on switch.
Lenovo S2 notebook is not turn on repair Figure 7.
Lenovo S2 notebook is not turn on repair figure 8.
Lenovo S2 notebook is not turn on repair Figure 9.
