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820-3332-A Spinning fan
- Thread starter rex1986
- Start date
Start posting some voltages.
Is normal that board starts itself when charger is plugged in.
Do you get all voltages, even VCORE?
Any USB activity?
Is normal that board starts itself when charger is plugged in.
Do you get all voltages, even VCORE?
Any USB activity?
I already reballed U8900, it's still the same but i found something out. If i press and hold the power button and then connect the charger, it turns on and it works perfectly. i also can restart the machine.
@2informaticos I will check later and post the values.
@2informaticos I will check later and post the values.
Do you mean machine starts in SMC bypass?
In such case fan should go to max; thath wouldn't be perfectly working...
U8900 is QFN chip; what did you reball???
Let see the result after changing it.
In such case fan should go to max; thath wouldn't be perfectly working...
U8900 is QFN chip; what did you reball???
Let see the result after changing it.
You only told us fan spinning...
Which voltages do you get on that board???
Which voltages do you get on that board???
Hi,
as i told you, the machine starts in smc bypass mode. If i connect only charger, without battery, i get the following voltages and if i connect the charger without battery, the fan doesn't spinn:
pp3v42_g4h
pp5v1_chgr_vdd
ppvbat_g3h
PP3V3_S5_PWRCTL
ppvin_s0_gfximpvp
missing voltages
vcore
pp1v8_s0
pp3v3_s0
SMC_S4_WAKESRC_EN
If i connect an usb mouse, the light of the mouse is blinking.
And the cpu slowly gets hot
Orange light is also present on charger.
And i am using a 60W charger, i hope this is enough.
as i told you, the machine starts in smc bypass mode. If i connect only charger, without battery, i get the following voltages and if i connect the charger without battery, the fan doesn't spinn:
pp3v42_g4h
pp5v1_chgr_vdd
ppvbat_g3h
PP3V3_S5_PWRCTL
ppvin_s0_gfximpvp
missing voltages
vcore
pp1v8_s0
pp3v3_s0
SMC_S4_WAKESRC_EN
If i connect an usb mouse, the light of the mouse is blinking.
And the cpu slowly gets hot
Orange light is also present on charger.
And i am using a 60W charger, i hope this is enough.
Last edited:
That board needs 85W charger; be sure to use original one.
If battery has some charge, should also start with 60W charger + battery.
Seems that PM_SLP_S4_L is pulsing; confirmm that.
Check if PM_SLP_S3_L also pulses...
If yes, check if all voltages (secondary supplies) controlled by these signals pulse too.
If battery has some charge, should also start with 60W charger + battery.
Seems that PM_SLP_S4_L is pulsing; confirmm that.
Check if PM_SLP_S3_L also pulses...
If yes, check if all voltages (secondary supplies) controlled by these signals pulse too.
"Check if PM_SLP_S3_L also pulses...
If yes, check if all voltages (secondary supplies) controlled by these signals pulse too."
An o-scope is able to catch any fast pulse...
ALL_SYS_PWRGD pulses?
If yes, check if all voltages (secondary supplies) controlled by these signals pulse too."
An o-scope is able to catch any fast pulse...
ALL_SYS_PWRGD pulses?