Hi,
I have HP Omen 15-dc0001nh (DA0G3DMBCE0 rev: E) with blinking capslock 5 long and 3 short. Fans spin constans speed.
HP worked for 2 months after i repaired (before damaged by thunder via rj45 port) I removed LAN ic and powered on
Now with blinking capslock:
All voltage present on big coils, except +VCCGT (i don't know this need for booting)
I tried re-flash bios with known firmware- same result (now i don't have spare bios chip to test spi flash failure)
DDR4 ram is ok, tested on other laptop
WLAN and SSD removed, only keyboard and AC adapter connected
Parts i changed:
PCH SR40B
Thunderbolt controller
MP2945A
E6930 mosfet for VCCGT
After power on PLTRST# signal go for a moment 3.3V and after 2.4V (that is not good)
I use for reference NLA_CFL_N17P1.pdf schematic, because for this HP impossible to find schematic or boardview
Maybe next week i'll have preprogrammed EC (IT8987E) chip and GD25B127DSIG bios chip
Any idea, what i check ?
regards
Tom
I have HP Omen 15-dc0001nh (DA0G3DMBCE0 rev: E) with blinking capslock 5 long and 3 short. Fans spin constans speed.
HP worked for 2 months after i repaired (before damaged by thunder via rj45 port) I removed LAN ic and powered on
Now with blinking capslock:
All voltage present on big coils, except +VCCGT (i don't know this need for booting)
I tried re-flash bios with known firmware- same result (now i don't have spare bios chip to test spi flash failure)
DDR4 ram is ok, tested on other laptop
WLAN and SSD removed, only keyboard and AC adapter connected
Parts i changed:
PCH SR40B
Thunderbolt controller
MP2945A
E6930 mosfet for VCCGT
After power on PLTRST# signal go for a moment 3.3V and after 2.4V (that is not good)
I use for reference NLA_CFL_N17P1.pdf schematic, because for this HP impossible to find schematic or boardview
Maybe next week i'll have preprogrammed EC (IT8987E) chip and GD25B127DSIG bios chip
Any idea, what i check ?
regards
Tom
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