HP Probook 640 G2 dead

[sakalaz]

Re: HP Probook 640 G2 dead

Ok. I figure the 1vdc goes to the CPU.
So, I think my power to the MB should be ok as I got all the voltages.

Therefore.. my problem might be in the startup chip or bios area?

If you have all the voltages, than try flashing the BIOS, but be carefull I think it's a 1.8v chip. Feeding it with 3.3 might fry it.

Next in line of suspects would be your EC chip. One way of testing it would be tracing down which pin is the power button input (PWR_SW# or similar) and another pin a signal to CPU (PM_PWRBTN# or similar)

Normal state of these pins is 3.3v and when you press the power button they must go to 0v
If this not the case you have missing some voltages / signals to EC / or EC is defective

[sakalaz]

Re: HP Probook 640 G2 dead

Hello good people,

Maybe you had a similar case... I have this mosfet at position Q66610 with a source shorted to ground. I have injected 1v and went even up to 5amps but did not notice any region of the board that is getting warm. Checked with a thermal camera.

Any clues how to pin point the short?

[Rockton]

Re: HP Probook 640 G2 dead

If you have all the voltages, than try flashing the BIOS, but be carefull I think it's a 1.8v chip. Feeding it with 3.3 might fry it.

Next in line of suspects would be your EC chip. One way of testing it would be tracing down which pin is the power button input (PWR_SW# or similar) and another pin a signal to CPU (PM_PWRBTN# or similar)

Normal state of these pins is 3.3v and when you press the power button they must go to 0v
If this not the case you have missing some voltages / signals to EC / or EC is defective

Tried reading the chip with 341 programmer and 1.8 volts today.
Got all FF FF. So. Not sure if chip is bad, if there's some sort of encryption, or if there is something wrong with my setup. Chip is on the board, no battery or charger hooked up. Looks like I'm going to be up most of the night.....

[sakalaz]

Re: HP Probook 640 G2 dead

Tried reading the chip with 341 programmer and 1.8 volts today.
Got all FF FF. So. Not sure if chip is bad, if there’s some sort of encryption, or if there is something wrong with my setup. Chip is on the board, no battery or charger hooked up. Looks like I’m going to be up most of the night.....

Not all the 341 software will work (my experience). Even if it manages to read the chip with some software it will fail to flash it. You could get a verification error message.

Try using this programmer software (select the Device 341 in the menu before reading) https://github.com/nofeletru/UsbAsp-...mmer_1.4.1.zip

Or an older version of original software 1.18? (can't remember what worked)

Read this:
https://winraid.level1techs.com/t/gu...rammer/32948/3

[sakalaz]

Re: HP Probook 640 G2 dead

You could remove the Chip and short the pins that are not the gate.
It would tell you if anything else on the board is shorted.

Well if I do that than my drain side of the mosfet would definitely be also shorted to ground wouldn't it?

[Stevedb]

Re: HP Probook 640 G2 dead

You could also use this software
.colibri or neoprogrammer they support more iced

Good luck

Best regards
Steve

[Rockton]

Re: HP Probook 640 G2 dead

You could also use this software
.colibri or neoprogrammer they support more iced

Good luck

Best regards
Steve

Both of these tell me chip is not connected or not responding.. so...
I have ordered some new chips, and a new ch341 programmer, ( Cause you never know and they are cheap and it might be faulty or have a bad cable connection etc.) Thanks for the help.

[Stevedb]

Re: HP Probook 640 G2 dead

Do you modified your programmer? Do you have the black version and do you use the 1.8v adapter?
Movie modification
https://youtu.be/-ln3VIZKKaE


Regards

Steve

[Rockton]

Re: HP Probook 640 G2 dead

Good questions.. i will have to check tonight when i get home

[sakalaz]

Re: HP Probook 640 G2 dead

Do you modified your programmer? Do you have the black version and do you use the 1.8v adapter?
Movie modification
https://youtu.be/-ln3VIZKKaE


Regards

Steve

IMHO there is no need for this.. I have been using ch341 (black edition without modification) a lot and did not have any problems.

If it fried chips people wouldn't buy these devices would they?

[sakalaz]

Re: HP Probook 640 G2 dead

Both of these tell me chip is not connected or not responding.. so...
I have ordered some new chips, and a new ch341 programmer, ( Cause you never know and they are cheap and it might be faulty or have a bad cable connection etc.) Thanks for the help.

Just get a 3.3v chip and try connecting to it.
NOTE:
* chip must be positioned the way like it is MARKED ON THE ch341
* check jumper position on ch341
* have you installed drivers for ch341?
* connect it to USB 2.0

[Rockton]

Re: HP Probook 640 G2 dead

Just get a 3.3v chip and try connecting to it.
NOTE:
* chip must be positioned the way like it is MARKED ON THE ch341
* check jumper position on ch341
* have you installed drivers for ch341?
* connect it to USB 2.0

Yes to all *
Jumper on Pin 1 and 2

Laptop only has orange charge light
t flash three times then stays solid.
The new chips should be in any day now, i will see if it reads them to figure what I will do next...

Just as an FYI.. PIN 1 on the Bios chip on MB has 3.3vdc going to it.

[Rockton]

Re: HP Probook 640 G2 dead

OK.. I modded the CH341 for 3.3vdc

I got some sort of a read from the chip.. but when i try to erase it it says it locked or protected.. to hit the unprotect. which does nothing.

I am attaching the chip dump

https://www.badcaps.net/forum/showpo...3&postcount=31

[Rockton]

Re: HP Probook 640 G2 dead

Ok, i can read and write to the chip now.. I wrote a new bios flash. Computer acts differently now. different lights light up, keyboard lights up.. Screen wont come on so I think its the wrong flash

[Stevedb]

Re: HP Probook 640 G2 dead

What did you do because it now works?

[Rockton]

Re: HP Probook 640 G2 dead

I modded the CH341 programmer to 3.3 vdc instead of 5 vdc and use NeoProgrammer 2.1.0.19

[Stevedb]

Re: HP Probook 640 G2 dead

Good for you neoprogrammer is good programma support the most ic same sad colibri

Best regards

Steve

[Demo5937]

Re: HP Probook 640 G2 dead

I need help on this model hp 64p-g2 whish is not power,
19v available but no 3v&5v present on this board and no free schematics of this product.
I need ur help to guide me so that I can locate and generate 3v&5v. Thanks

[ionut68]

Re: HP Probook 640 G2 dead

Pad 60800 has 1v.
Pad 60810 has 20v.
Pad 60500 has 0v.
Pad 60510 has 20v.
Pad 61410 has 20v.
Pad 61400 has 0v.
Pad 60011 has 20v.
On flip side of board:
Pad 1411 has 3.3v.
Pad 7100 has 1v.
Pad 4500 has 1v.
Pad 300 has 3.3v.
Pad 310 has 0v.
Pad 7005 has 5.25v.
Pad 7004 has 0v.
Pad 7002 has 0v.
Pad 7001 has 3.3v.
Pad 7000 has 3.3v.
Pad 7002 has 5.25v.
Pad 60210 has 20v.
Pad 60200 has 5.25v.
Pad 60110 has 5.25v.
Pad RTC60100 has 3.3v.

Hello
I have a problem with an HP 650 g2 notebook, CIRCUS-6050A2723701-MB-A02 board type.
I measured all the measurement points and they are identical to those described by my colleague Rockton. I put the oscilloscope on the Bios memory pins.
- On terminal 6 SCLK I have the voltage 0V
- pin 4 GND 0V which is normal.
The rest of the pins have 3.3V
Where is the CLOK for Bios formed?
Before measuring with the oscilloscope I wrote and rewrote all kinds of variants and encoded and decoded Bios memory
Without the scheme I can't handle it, I would be grateful if someone would publish a scheme or a living boron.
Thanks!

[mylocky]

Re: HP Probook 640 G2 dead

Somebody have a solution for that problem?