Dell E5440 does not turn on

[poweron]

I have another problem with a Dell E5440 VAW30 LA-9832P which is not a sign of life, LED off, I checked + 3.3V_ALW and + 5V_ALW are present, but I noticed that it is missing + 5_RUN and the + 3.3V_RUN size 1.09v on U46 on this the RUN_ON and SIO_SLP_S3 # signals are missing and also on U45 and U43 missing also + 3.3V_M which feeds the two bios U1 and U2

[mcplslg123]

Re: Dell E5440 does not turn on

Check kbc for basic requirement first. Rsm_RST & LID_SW present??

[poweron]

Re: Dell E5440 does not turn on

hello, I'm sorry but I can't find them, what pins are they?

[poweron]

Re: Dell E5440 does not turn on

these signals are not written on the KBC

[mcplslg123]

Re: Dell E5440 does not turn on

You can measure rsm_rst on U41/42

[mcplslg123]

Re: Dell E5440 does not turn on

Lid signal perhaps is on daugther board in this mb.

[Techtiger]

Re: Dell E5440 does not turn on

Check also PS_ID , ACAV_ID(ACOK)

[poweron]

Re: Dell E5440 does not turn on

Lid signal perhaps is on daugther board in this mb.

RSM_RST = 3.3v is present on pin 3 of U41 and on pin 2 of U42

[poweron]

Re: Dell E5440 does not turn on

You can measure rsm_rst on U41/42

RSM_RST = 3.3v is present on pin 3 of U41 and on pin 2 of U42

[poweron]

Re: Dell E5440 does not turn on

Check also PS_ID , ACAV_ID(ACOK)

PS_ID is present 3.1v ACAV_ID cannot find it there is ACAV_IN and is not present

[Techtiger]

Re: Dell E5440 does not turn on

PU402 pin5 is ACOK the same signal goes to SIO KBC & check POWER_SW#_MB 3.3V (# =high low) when pressing Power this will go to 0V and come back to 3.3V ,POWER_SW_IN# 3.3V after R329 test #, make sure RTC_CELL for no short

[poweron]

Re: Dell E5440 does not turn on

ACOK is present on pin 5 of PU402, pressing power on / off button POWER_SW # _MB from 3.3 goes to 0v and returns to 3.3v

[Techtiger]

Re: Dell E5440 does not turn on

What about POWER_SW_IN# 3.3V after R329 test #,RTC_CELL for no short?

[EP3RROR]

Re: Dell E5440 does not turn on

had a board with the same problem. i had put it aside for a couple of months as it needed a new lcd and when i tried to power it on , no power at all. voltages where present. i reprogrammed both bios chips but still nothing.

[poweron]

Re: Dell E5440 does not turn on

+ RTC_CELL is present = 3.1v I cannot find the R329 on the board, the names of the resistors and capacitors are not written

[Techtiger]

Re: Dell E5440 does not turn on

+ RTC_CELL is present = 3.1v I cannot find the R329 on the board, the names of the resistors and capacitors are not written

to find the resistors and capacitors you have to do a continuity test multimeter find out PCH_RTCRST , AC_PRESENT ,+3.3V_ALW_PCH, when you press power find out any Voltage change SIO SLP S3/S4

[poweron]

Re: Dell E5440 does not turn on

AC_PRESENT is present, 3.3v , + 3.3V_ALW_PCH = 0v, PCH_RTCRST I can't measure, SIO_SLP_S3 / 4 is always 0v also pressing power button

[Techtiger]

Re: Dell E5440 does not turn on

AC_PRESENT is present, 3.3v , + 3.3V_ALW_PCH = 0v, PCH_RTCRST I can't measure, SIO_SLP_S3 / 4 is always 0v also pressing power button

Try to flash Bios but save the old Dump

[poweron]

Re: Dell E5440 does not turn on

should I flash U1 and U2? I saw several files, do you know which one is the best surely flickering?

[poweron]

Re: Dell E5440 does not turn on

when I select the file to program a ch341a programmer message comes out: file too long, what to do?