lenovo z580 when press power switch it poweron for 1 sec then auto poweroff what should i check in this case
motherboard no : da0lz3mb6g0 rev g
motherboard no : da0lz3mb6g0 rev g
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Re: lenovo z580 poweron for 1 sec then auto poweroff
when press power the 1.5 ram volt present for a second but cpu volt not present -
Re: lenovo z580 poweron for 1 sec then auto poweroff
schematic attached i found that pq42 has 3.3 on the drain but no voltage on the source and the gate = 0 voltComment
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Re: lenovo z580 poweron for 1 sec then auto poweroff
What is the history of the unit ?
Remove all power. Meter in resistance mode.
Check the resistance to ground of each coil on the logic board. If the resistance is low, the current sense circuit may be tripping to power down the rail.
You may also have a defective cap on that leg of the circuit.Comment
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Hi Everyone,
I have a Lenovo G50-80 that auto powers On when AC (Charger) is connected. I have checked the BIOS settings and there is no option to turn On or Off that feature as it is in some HP EliteBooks. I did update the BIOS and still same.
I then flashed the BIOS with a different bin file I downloaded here, It worked (didn't auto power on) for some time (after testing up to 5 times) but has now started again to auto power on when AC is connected.
The CMOS battery voltage is 3v. I have also tested with two main batteries as well. I would be glad if anyone... -
Device : Laptop
Brand : Lenovo
model: LENOVO B480
board: LA48 MB 11264-1M.48.4TD01.01M
Issue: auto power on , No display tried flashed bios same issue
S0_PWR_GOOD - 3.2v
PM_DRAM_PWRGD - 3.3v
VCC_GFXCORE - 0v
VCC_CORE -0.8
IMVP_PWRGD -3.3v
SYS_PWROK -0v
DDR3_DRAMRST# -1.5v
PCI_PLTRST# -3.3v
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