MODEL:HP PAVILLION 450
PCB:INVENTEC HARVEY 6050A2493101
PROBLEM: TOTAL DEAD, NO DC JACK LIGHT.
Here is what i've found out.
01.Q6010-Source 19V,gate-24V,Drain 19V
02.charging IC BQ24728 measurements:
ACN/ACP-19V
cmsrc-19V
ACDRV-24V
ACPRES-2.9V(??)
ACDET-2.62V
SDA/SCL-3V
REGN-6V
R6024 has 3V Pull up ok on one side but on ther side connected to Charging ic's ACOK pin is 2.9V . The resistor is measured out of circuit 10K.
ADP_ID is ok at 0.58V measured on D6015. Other end of diode is stable 3V.
KBC pin 70-0.58V. I've measured PIN 71/72/73/35 and they are all ok as per schematics.
3V/5V LDO present.
Offline Consumption is 0.012 Amps at the beginning and then jumps to 0.023A but nothing is warming up though a slight increase in temperature can be filled near TPS 51123 IC. Resistance on 3/5V coil is correct as per working m/b.
All the fets like Q6011/Q6012/Q6000/Q6001/Q6100/Q6101/Q6150/Q6151 are ok .
Parts replaced:
01.BQ24728-NEW
02.IT8517-NEW
03.TPS 51123-NEW
04.Both eprom flashed with known good bios.
What can be wrong here?? Any ideas??
Status-all the same-dead with no dc jack light.
PCB:INVENTEC HARVEY 6050A2493101
PROBLEM: TOTAL DEAD, NO DC JACK LIGHT.
Here is what i've found out.
01.Q6010-Source 19V,gate-24V,Drain 19V
02.charging IC BQ24728 measurements:
ACN/ACP-19V
cmsrc-19V
ACDRV-24V
ACPRES-2.9V(??)
ACDET-2.62V
SDA/SCL-3V
REGN-6V
R6024 has 3V Pull up ok on one side but on ther side connected to Charging ic's ACOK pin is 2.9V . The resistor is measured out of circuit 10K.
ADP_ID is ok at 0.58V measured on D6015. Other end of diode is stable 3V.
KBC pin 70-0.58V. I've measured PIN 71/72/73/35 and they are all ok as per schematics.
3V/5V LDO present.
Offline Consumption is 0.012 Amps at the beginning and then jumps to 0.023A but nothing is warming up though a slight increase in temperature can be filled near TPS 51123 IC. Resistance on 3/5V coil is correct as per working m/b.
All the fets like Q6011/Q6012/Q6000/Q6001/Q6100/Q6101/Q6150/Q6151 are ok .
Parts replaced:
01.BQ24728-NEW
02.IT8517-NEW
03.TPS 51123-NEW
04.Both eprom flashed with known good bios.
What can be wrong here?? Any ideas??
Status-all the same-dead with no dc jack light.
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