UX330UAR rev 2.1 no DISPLAY

[kalilinux25]

Hi gooday to all.. Having a problem with this unit hoep someone can guide me where to point the issue is.

here is the signals Ive measured so far, if there is need to test again i will test it.

PM_SYSPWROK_PCH -3.2V
PM_PWROK_PCH - 3.2V
PLT_RST# - 3.2V
DDR3_DRAMRST# -0V
RTC_X2 - 32.76KHZ isok on oscillo
RTC_RST# - 3.2V
CHIP SELECT PIN 1 ON BIOS has signal of reset
PM_RSMRST# - 3,3V
24MHZ IS OK ON OSCI
SUSB_EC# 3.3V
PCH_SLP_S0# -3.5V
IMVP_PWRGD - 3.5V
SLP_S5#-3.5V


DDR_VCCC - 5.1V
DDR_VTTREFF_0.6V
TON- 2.0V
VRHOT# 1.0V
1.2V ON -3.3V
+VCCGT -0V
VSUS_ON 3.3V


Ill atached the boardview also..

[mcplslg123]

Re: UX330UAR rev 2.1 no DISPLAY

TON at 2V is bit suspicious. Check value of the resistor outside circuit. DRAMRST# is missing.

[kalilinux25]

Re: UX330UAR rev 2.1 no DISPLAY

TON at 2V is bit suspicious. Check value of the resistor outside circuit. DRAMRST# is missing.

pr8613 - is a P_DDR_TON_10 CHECK value outboard it has 561k after return the resistor back check voltage 2.0v same

[mcplslg123]

Re: UX330UAR rev 2.1 no DISPLAY

The value at 561K seems correct.

[kalilinux25]

Re: UX330UAR rev 2.1 no DISPLAY

The value at 561K seems correct.

hope you can advise me something sir

[DanielDacko]

Re: UX330UAR rev 2.1 no DISPLAY

Did you tried another bios?

[kalilinux25]

Re: UX330UAR rev 2.1 no DISPLAY

Did you tried another bios?

Yes sir I already have sir

[kalilinux25]

Re: UX330UAR rev 2.1 no DISPLAY

those it means the ram ic is bad or the chipset ram is bad also?

[mcplslg123]

Re: UX330UAR rev 2.1 no DISPLAY

Ram IC being bad is very unlikely as it has no role in reset of memory. It could be defective Bios/ram chip itself, bad traces on the pcb . The ram is reset by processor(SOC here)-so it could be even bad SOC. However, DRAMRST# is usually pulled low in case of cpu failure like 0.1V or so though in some cases it can be zero. What is the resistance on DRAMRST# ? Also try changing the eeprom IC also.