Hello.
The laptop turns on, but there is no chime and image.
U7400
1 - DDREG_VTTSNS - 0
2 - PP1V2_S3 - 1.2
3 - PP0V6_S0_DDRVTT — 0
4 - GND
5 - PPVTT_S3_DDR_BUF — 0
6 - DDREG_1V8_VREF - 1.8
7 - GND_DDREG_SGND
8 - DDREG_FB - 1.2
9 - DDREG_VDDQSNS — 1.2
10 - GND
11 - DDREG_DRVL - 0
12 - PP5V_S3 - 5.05
13 - DDREG_LL - 1.2
14 - DDREG_DRVH - 1.2
15 - DDREG_VBST - 6.2
16 - DDREG_EN - 3.31
17 - MEMVTT_EN - 3.31
18 - DDREG_TRIP - 0-
19 - DDREG_MODE — 0
20 - DDREG_PGOOD — 3.3 if present, do you need to worry about PP0V6_S0_DDRVTT ?
also missing
PPHV_S0SW_LCDBKLT — 0
EDP_BKLT_EN — 0
PP15V_TBT — 0
replaced U7400 and Q7430, nothing has changed!
There is no short circuit on the board!
PP1V8_S3 - 1,8
PP1V5_S0 - 1,5
PP1V2_S3 - 1,2
PP1V05_S0 - 1,05
PP1V05_SUS - 1,05
PP1V05_S0SW_HSIO - 1,05
PPVCC_S0_CPU — 1,8
All powerGoods are present!
USB lights up!
thanks
The laptop turns on, but there is no chime and image.
U7400
1 - DDREG_VTTSNS - 0
2 - PP1V2_S3 - 1.2
3 - PP0V6_S0_DDRVTT — 0
4 - GND
5 - PPVTT_S3_DDR_BUF — 0
6 - DDREG_1V8_VREF - 1.8
7 - GND_DDREG_SGND
8 - DDREG_FB - 1.2
9 - DDREG_VDDQSNS — 1.2
10 - GND
11 - DDREG_DRVL - 0
12 - PP5V_S3 - 5.05
13 - DDREG_LL - 1.2
14 - DDREG_DRVH - 1.2
15 - DDREG_VBST - 6.2
16 - DDREG_EN - 3.31
17 - MEMVTT_EN - 3.31
18 - DDREG_TRIP - 0-
19 - DDREG_MODE — 0
20 - DDREG_PGOOD — 3.3 if present, do you need to worry about PP0V6_S0_DDRVTT ?
also missing
PPHV_S0SW_LCDBKLT — 0
EDP_BKLT_EN — 0
PP15V_TBT — 0
replaced U7400 and Q7430, nothing has changed!
There is no short circuit on the board!
PP1V8_S3 - 1,8
PP1V5_S0 - 1,5
PP1V2_S3 - 1,2
PP1V05_S0 - 1,05
PP1V05_SUS - 1,05
PP1V05_S0SW_HSIO - 1,05
PPVCC_S0_CPU — 1,8
All powerGoods are present!
USB lights up!
thanks