Hello all I have an HP ELitebook 2560p (6050A2400201-MB-A02) with strange power issue,
Firstly it had no power , tps 51123 was shorted by
BCD_AZV321KTR_E1_SOT23_5P which was shorted by
As well (u2004 on service manual) , i replaced
TPS 51123 (3v/5v standby reg) and AZV321KTR
after that pin 18 of tps 51123 (ENC) shorted by
SSM3K7002FU mosfet (q2039 on manual)
After i removed the mosfet and system
Was on but there is a strange problem after this,
When you pluged in charger, laptop turns on
Automatically and Amp raises up To
Around 0.68 ~ 0.74 amp and laptop shows
Hp logo on screen (seems everything works normally)
But after 4 or 5 seconds laptop turns off and current
Drain drops to around 0.06 ~ 0.07 amp and
Power button is not responding , by following
The cpu fan start to run at max speed
Draining goes from 0.06 to 0.15 Thats why
Fan is runing full speed and then about in 1 min
Fan is slowing down and current drain goes to
0.02 from 0.15 slowly it never starts again with power button, (power button has no problem) and that while voltage on power button drops to 0.3V and its impossible to start laptop again by pressing power button, i mean its not responding
Unless i plugged out the charger and plagged in
Again and this cycle goes like this
İt seems that its is an fake cpu overheating
Issue but not (while happening this cpu
İs like ice cold, not even warm but motherboard
Thinks that the cpu is very very hot with in 5
Seconds but its not actually)
What i did ;
İ checked all the voltages all is ok
3.3, 5 , 3s , 5s, 1.8 , 1.8s 1.5, 1.5s ,0.75s
1.05s all are ok but there is no voltage on
Vgfx core (L2015 on manual) also PWR_GOOD_3
Signal is missing on cpu power controller
ISL95831HRTZ (U2023) at pin 8, (actually its not missing
When you plugged in charger first PWR_GOOD_3 is present which its about 2.85V and after laptop
Shows hp logo and off then PWR_GOOD_3 signals dprops
0 V With in 4 or 5 sec. Then fan start run max laptop
Seems power off only fun is running and power
Switch does not work
İ flashed more than 3 bios all is same reaction
i sure that its not an bios issue or an clean me issue
i sure that hm chipset and KBC are ok
İ tested 3 different original hp charger as well
All is same reaction
Please help me ������ what night have the problem??
İ sure that its an incorrect or fake termal alert
But i could not understand what is casing this
NOTE : confirm that CPU is also ok, and
System has no dedicated graphics card, its
İ5 2450m with intel HD graphics
Firstly it had no power , tps 51123 was shorted by
BCD_AZV321KTR_E1_SOT23_5P which was shorted by
As well (u2004 on service manual) , i replaced
TPS 51123 (3v/5v standby reg) and AZV321KTR
after that pin 18 of tps 51123 (ENC) shorted by
SSM3K7002FU mosfet (q2039 on manual)
After i removed the mosfet and system
Was on but there is a strange problem after this,
When you pluged in charger, laptop turns on
Automatically and Amp raises up To
Around 0.68 ~ 0.74 amp and laptop shows
Hp logo on screen (seems everything works normally)
But after 4 or 5 seconds laptop turns off and current
Drain drops to around 0.06 ~ 0.07 amp and
Power button is not responding , by following
The cpu fan start to run at max speed
Draining goes from 0.06 to 0.15 Thats why
Fan is runing full speed and then about in 1 min
Fan is slowing down and current drain goes to
0.02 from 0.15 slowly it never starts again with power button, (power button has no problem) and that while voltage on power button drops to 0.3V and its impossible to start laptop again by pressing power button, i mean its not responding
Unless i plugged out the charger and plagged in
Again and this cycle goes like this
İt seems that its is an fake cpu overheating
Issue but not (while happening this cpu
İs like ice cold, not even warm but motherboard
Thinks that the cpu is very very hot with in 5
Seconds but its not actually)
What i did ;
İ checked all the voltages all is ok
3.3, 5 , 3s , 5s, 1.8 , 1.8s 1.5, 1.5s ,0.75s
1.05s all are ok but there is no voltage on
Vgfx core (L2015 on manual) also PWR_GOOD_3
Signal is missing on cpu power controller
ISL95831HRTZ (U2023) at pin 8, (actually its not missing
When you plugged in charger first PWR_GOOD_3 is present which its about 2.85V and after laptop
Shows hp logo and off then PWR_GOOD_3 signals dprops
0 V With in 4 or 5 sec. Then fan start run max laptop
Seems power off only fun is running and power
Switch does not work
İ flashed more than 3 bios all is same reaction
i sure that its not an bios issue or an clean me issue
i sure that hm chipset and KBC are ok
İ tested 3 different original hp charger as well
All is same reaction
Please help me ������ what night have the problem??
İ sure that its an incorrect or fake termal alert
But i could not understand what is casing this
NOTE : confirm that CPU is also ok, and
System has no dedicated graphics card, its
İ5 2450m with intel HD graphics
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