Hi, I have a Dell Precision 5530 I7 8750H, Quadro P2000, motherboard LA-G341P.
At first, when trying to boot it up, the power button led was on for 1~2 sec, then I backupped the bios and realise it was corrupted.
I tried 2 other bios (one that should be working on this motherboard and another one on which someone tried to fix my corrupted bios) but both bios resulted in the power button LED not powering up, I finally flashed my original bios and it's not working like before...
In the process of flashing the bios, I wrongly desolder RH5892 and CH45, also I shorted RP4 7th and 8th pin "PCH_SPI_CLK_R" and "PCH_SPI_SI_R" which are directly connected to the eeprom and are "at 33ohm" from the PCH thanks to RP4 so it wasn't like a "severe" short cirtcuit I would say. There was also very minor water damage, like a coil with surface rust on top, corrosion on two SMD cap, the RE23 resistor as long as the RE122 pads (all seems fixed except RE122 pads which is a bit "janky")
Since then I tried to diagnose a bit the board, the power button is correctly powered with a 3.3v input, I checked every voltage on the boot sequence (page 76 of schematic) and it seems like there is something wrong at "CL_RST# -> CLINK_RST#" and further. After about 10~20min of troubleshooting, I realised the PCH heated a little bit, maybe like 30°C while the rest of the board was at 20°C, according to my lab PSU, the board is drawing about 40mA => 0.8w.
Attached file are my current corrupted bios as long as the schematic + boardview
Right now I'm stuck with these voltage :
RTCVCC = 3.06v
PCH_RTCRST# = 3.06v
+TBT_VBUS1 -> can't find it
+TBT_VBUS2 -> can't find it
+3V_PDLDO_P -> can't find it
+3V_PDLDO_OUT -> can't find it
EN_PD_HV_1 = 0v
DCIN1_EN = 3.3v
+CHG_VIN_20V -> ? +CHG_SRC_20V = 19.2v
B+ = 12.6v (no battery plugged)
ALWON = 3.07v
ACAV_IN = 3.4v
+3VALWP = 3.3v
+5VALWP = 5.15v
+5VALW = 5.15v
+3VALW = 3.4v
VCCDSW_EN = 3.3v
DSW_PWROK = 3.3v
BATLOW# = 3.3v
SLP_SUS#= 0v
EXT_PWR_GATE# -> ? CPU_VCCIO_PWR_GATE# = 2.08v
SIO_SLP_S0# = 3.3v
CPU_C10_GATE# = 2.08v
+3V_PCH = 3.3v
+1.8V_PCH = 2.08v
+VCCPRIM_CORE -> can't find it
+1.0V_MPHYGT -> can't find it
+1V_PCH_PRIM = 1.05v
PCH_RSMRST# = 3.3v
ESPI_RESET# = 2.08v
SUSWARN# -> ME_SUS_PWR_ACK = 0.6v
SUSCLK = 1.6v
AC_PRESENT = 3.3v
SUSACK = 0.6v
SIO_SLP_A# = 0v
CL_RST# -> CLINK_RST# = a pin on the WLAN connector, didn't bothered
...
SUS_ON_EC = 0v
Thanks you very much for any help
At first, when trying to boot it up, the power button led was on for 1~2 sec, then I backupped the bios and realise it was corrupted.
I tried 2 other bios (one that should be working on this motherboard and another one on which someone tried to fix my corrupted bios) but both bios resulted in the power button LED not powering up, I finally flashed my original bios and it's not working like before...
In the process of flashing the bios, I wrongly desolder RH5892 and CH45, also I shorted RP4 7th and 8th pin "PCH_SPI_CLK_R" and "PCH_SPI_SI_R" which are directly connected to the eeprom and are "at 33ohm" from the PCH thanks to RP4 so it wasn't like a "severe" short cirtcuit I would say. There was also very minor water damage, like a coil with surface rust on top, corrosion on two SMD cap, the RE23 resistor as long as the RE122 pads (all seems fixed except RE122 pads which is a bit "janky")
Since then I tried to diagnose a bit the board, the power button is correctly powered with a 3.3v input, I checked every voltage on the boot sequence (page 76 of schematic) and it seems like there is something wrong at "CL_RST# -> CLINK_RST#" and further. After about 10~20min of troubleshooting, I realised the PCH heated a little bit, maybe like 30°C while the rest of the board was at 20°C, according to my lab PSU, the board is drawing about 40mA => 0.8w.
Attached file are my current corrupted bios as long as the schematic + boardview
Right now I'm stuck with these voltage :
RTCVCC = 3.06v
PCH_RTCRST# = 3.06v
+TBT_VBUS1 -> can't find it
+TBT_VBUS2 -> can't find it
+3V_PDLDO_P -> can't find it
+3V_PDLDO_OUT -> can't find it
EN_PD_HV_1 = 0v
DCIN1_EN = 3.3v
+CHG_VIN_20V -> ? +CHG_SRC_20V = 19.2v
B+ = 12.6v (no battery plugged)
ALWON = 3.07v
ACAV_IN = 3.4v
+3VALWP = 3.3v
+5VALWP = 5.15v
+5VALW = 5.15v
+3VALW = 3.4v
VCCDSW_EN = 3.3v
DSW_PWROK = 3.3v
BATLOW# = 3.3v
SLP_SUS#= 0v
EXT_PWR_GATE# -> ? CPU_VCCIO_PWR_GATE# = 2.08v
SIO_SLP_S0# = 3.3v
CPU_C10_GATE# = 2.08v
+3V_PCH = 3.3v
+1.8V_PCH = 2.08v
+VCCPRIM_CORE -> can't find it
+1.0V_MPHYGT -> can't find it
+1V_PCH_PRIM = 1.05v
PCH_RSMRST# = 3.3v
ESPI_RESET# = 2.08v
SUSWARN# -> ME_SUS_PWR_ACK = 0.6v
SUSCLK = 1.6v
AC_PRESENT = 3.3v
SUSACK = 0.6v
SIO_SLP_A# = 0v
CL_RST# -> CLINK_RST# = a pin on the WLAN connector, didn't bothered
...
SUS_ON_EC = 0v
Thanks you very much for any help
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