Dell XPS 15 9560 - Necessaries lines for start the screen ?

[corrize]

Hello, I have a motherboard broken (PCB), only lines are cutted (15-20 according the boardview). Somes lines goes to PCH. The power part of the MB is ok, it charging and have 19v. It dont start ; when I press button, start led goes on, and off after 15s. Nothing else.

I don't want to try to repair it, just that the screen go on. So, according your experience and memory, among those lines, wich ones could be necessary for see the screen goes on pls ?

I guess it could be useful ;
AC_PRESENT
SUS_ON_EC (DC/DC control)

???
PCH_RTCRST#
RUN_ON-EC
PCH_ALW_ON
PCH_PCIE_WAKE#

LPC_FRAME# (LPC is a bios bus)
LPC_AD0
LPC_AD1
LPC_AD3

PRW_TB_DOCK#
CLK_PCI_MEK
PCI_CLK_LPC1
RESET_OUT# (for shutdown something)
SPK_DET#
CLK_RUN
SIO_SLP_A# (from PCH)
SIO_SLP_S4#

[piernov]

Re: Dell XPS 15 9560 - Necessaries lines for start the screen ?

Most likely all of them except PWR_TB_DOCK# and SPK_DET#, and maybe PCH_PCIE_WAKE#.

[corrize]

Re: Dell XPS 15 9560 - Necessaries lines for start the screen ?

OK thanks, I saw Dell have a stuff for testing screen ; « D » key after pressing the power button and before the boot. But I guess it should be in BIOS. So full starting sequence is needed too.