HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

PR302 & PR297 are short pads

PR67 = 2.58k ohms (3.3k ohms stated in schematics)

After removing PR302, PG is still 1.3v. But after comparing it with another working board (1040 g1), the 1.3v seems to be okay......

so you conform that MB 1040 G1 working Bord 5V regulator IC PG is 1.3V ?
is the 3/5 Regulator the same ? NB679AGD-Z?
after PL31 you have 6Caps check all of them most of the time PC200 cause fault

there is a way of by pass this only for test putting a jumper from pin 11 to 3 of PU16 PU24 pin5 to 13 or if you have DC regulate apply PG 1V 3A & see what are the SMD getting heat

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

so you conform that MB 1040 G1 working Bord 5V regulator IC PG is 1.3V ?
is the 3/5 Regulator the same ? NB679AGD-Z?
after PL31 you have 6Caps check all of them most of the time PC200 cause fault

MB 1040 G1 uses TPS51285A while MB 1040 G3 uses NB679AGD-Z

PG for 1040 G1 from TPS51285A on Pin 7 = 3.36v

while

PG for 1040 G3 from NB679AGD-Z on Pin 3 = 1.3v

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Connection between Pin 3 of PU16 and Pin 5 of PU13

Pin 3 [PU16] ---> PR302 ---> PR67 ---> PR77 ---> Pin 5 [PU13]

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

PG for 1040 G1 from TPS51285A on Pin 7 = 3.36v

Pin 7 of TPS51285A [PG] connects through some resistors (not identified yet) to Pin 5 of U3701 [LM393]

At Pin 7 of TPS51285A = 3.36v

At Pin 5 of U3701 [LM393] = 1.3v

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

MB 1040 G1 uses TPS51285A while MB 1040 G3 uses NB679AGD-Z

PG for 1040 G1 from TPS51285A on Pin 7 = 3.36v

while

PG for 1040 G3 from NB679AGD-Z on Pin 3 = 1.3v

because G1 is TPS51285A & G3 is NB679AGD-Z different IC different platform this i quit normal

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

because G1 is TPS51285A & G3 is NB679AGD-Z different IC different platform this i quit normal

okay. What else can be the problem?

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

PU22 Readings:
Pin 1 = 5.89v
Pin 2 = 0.53v
Pin 3 = 4.9v [DRVON_EN]
Pin 4 = 5.12v
Pin 5 = 4.47v
Pin 6 = 0v
Pin 7 = 1.05v
Pin 8 = 1.50v

PWM is present but 0.53V its low for this IC it should be around 2V back up OLD bin flash BIOS, what is the voltage on PU11 pin 2 ?

[Stevedb]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Try clean me from original bios

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Any work involving BIOS programming might be hard for me now because the programmer within my reach isn't capable of recent generations PC and 16mb files......

But would find a way out though......

Can water damage lead to a corrupt BIOS?

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

PWM is present but 0.53V its low for this IC it should be around 2V back up OLD bin flash BIOS, what is the voltage on PU11 pin 2 ?

Currently,

PU22
Pin 2 = 0.47v

PU11
Pin 2 = 0.47