Re: HP BIOS unlock tool
Sorted - Using RCUnlocker worked for me...
cdgold3
Member
Last Activity: 04-06-2023, 03:40 PM
Joined: 05-09-2018
Location: North East
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Re: HP BIOS unlock tool
Hi Guys,
Trying to unlock bios on a HP ProBook 650 G1 with the HP Unlock tool but unlocked dump is stall password protected.
Can anyone help or point me in the right direction?
Thanks...Leave a comment:
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Re: Clevo n870hc / No boot
after replacing PQ39 that fixed the short to AC but i found another on PC221,PC222
After removing PJ44 short disappeared from side 1 but side 2 is still to ground.
I cant work out where side 2 connects to. Can anyone point me in the right direction?...Leave a comment:
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Re: Clevo n870hc / No boot
PQ39 was faulty, now have 19v againLeave a comment:
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Re: Clevo n870hc / No boot
Hi tachtiger,
Really appreciate your help
Last night i found that there was no VREG5 on pin1 on PU16.
I tracked from Q49 Pin 2 to R700 and got 4.47v. Unfortunately i may have caused a shorted something when looking at PC235. So now i have a short to ground on the 19v rail.
Before the above i removed PQ43 and PQ42 and they seemed ok. just they are not getting a signal to trigger.
I tried removing both U16 and PC235 and still got the short. So at the moment i...Last edited by cdgold3; 07-10-2020, 03:53 AM.Leave a comment:
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Re: Clevo n870hc / No boot
1 - 0.00
17 0.08- 0.09
19 0.00
20 0.00
21 0.00
22 4.49...Leave a comment:
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Re: Clevo n870hc / No boot
Was working around PU16 before you posted
as VVD3 is working with 3.3v and measuring the pins i get:
pin 10 - UGATE2 4.47v (Guessing trigger votage?)
pin 12 - LGATE2 0.03v (Guessing trigger votage?)
VVD5
pin 21 - UGATE1 0.00v
pin 19 - LGATE1 0.00v...Leave a comment:
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Re: Clevo n870hc / No boot
Right, Found a 5v feed on Q49 pin 2/3 and on r699Leave a comment:
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Re: Clevo n870hc / No boot
Pad on side of U31 - no resistance
Pad other side - 1.191Leave a comment:
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Re: Clevo n870hc / No boot
Removed and got about 0.65v and then it started to slowly drop on pins 1,2,6,7 - u31...Leave a comment:
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Re: Clevo n870hc / No boot
Thanks tachtiger for all your help
Getting there slowly
Nothing from pin 4 on PQ42. just tracing DD_ON# & SUSB# now....Last edited by cdgold3; 07-09-2020, 07:35 AM.Leave a comment:
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Re: Clevo n870hc / No boot
Thanks tachtiger
v3.3
u31
--------
pin 1,2,6,7 - vdd3 - v3.3
pin 8,9 - 3.3vs - v0.00
pin 13,14 - 3.3v - v0.00
v5
u30
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pin 1,2,6,7 vdd5 - v0.00
pin 8,9 - 5vs - v0.00
pin 13,14 - 5v - v0.00
u26 - VA
--------
1 - 19.28v
So it does look like i have 5v is rail down. I have been looking at the type-c/usb 3.0 area as i can see a bit of what looks like liquid damage as U14 looks a bit crusty....Last edited by cdgold3; 07-09-2020, 02:33 AM.Leave a comment:
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Re: Clevo n870hc / No boot
I have been working on finding 19v and 3.3v and they seem to be fine but i cant find the 5v rail.
Can anyone tell me if on page 84 the type-c, 5v should that be always live with ac connected?Last edited by cdgold3; 07-08-2020, 03:44 PM.Leave a comment:
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Re: Clevo n870hc / No boot
Hi piernov,
Is that with no power attached?...Leave a comment:
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Re: Clevo n870hc / No boot
So I'm guessing I have a short on the gpu and cpu side as I get a connection to ground even on the CPU points on top.
What's the best way to test faulty caps without removing one side? Or is there no way without proper equipment?
I am just working my may thought the diagrams if anyone can point me to something else that may be causing it?
Would a dead gpu/CPU cause everything to ground?...Leave a comment:
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Re: Clevo n870hc / No boot
Checked and could not see anything in the fan. Its my unit and did not see anything....Leave a comment:
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Re: Clevo n870hc / No boot
I removed cap c578, tested on bench and works fine removedLeave a comment:
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Re: Clevo n870hc / No boot
It also seem to be around the bottom of the board as well, in the cpu and gpu area.
Unless i am doing something wrong?...Leave a comment:
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Re: Clevo n870hc / No boot
Thanks Duranitron
I have started doing a cap test and found shorts in:
Page 66 - Gpu
c587, c616, c618, c619, c621
Page 55 - Processor 5/6
c594, c595
Page 56 - Processor 6/6
c596, c579
Before i start changing the caps, i cant seem to find what may have caused the issue. Possable GPU/CPU Temp?Leave a comment:
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Re: Clevo n870hc / No boot
Doing some basic testing:
AC Port = 19.30v
Bios u43 = Ground + pin 8 = 2.84v (Pin 1 + 8 = 2.84v)
Will update when i get moreLeave a comment:
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