Re: Dead hp dv6 (quanta ut3)
yes the led ligth after conect the charger
yes the led ligth after conect the charger
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Re: Dead hp dv6 (quanta ut3)
Check voltages on pins 9, 22, 67, 19, 90, 127 on U20, adaptor plugged in before pressing power button.
Check voltages on pins 101, 99, 98, 95, 6, 16 on U20 after pressing power button.Comment
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Re: Dead hp dv6 (quanta ut3)
Hello guys, I have the similar problem with my CQ 71, All voltages comming to KB3926 seem ok.
Pins 9, 22, 33, 96, 111, 126, 67 = 3.3V
Pins 11, 25, 35, 69, 94, 113 = GND
Charger voltages seem ok
When i press power button the NBSWON on KB3926 goes to 0V, that is ok, but the DNBSWON connecting north bridge stays high (3.4V) all the time, doesn't go low.
Should i replace KB3926?
For how long DNBSWON goes low, is it measurable with multimeter because i dont have osciloscope at my disposal?Comment
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HP 15-CS3067nl Quanta DAG7BMB68C0 Rev C Motherboard
Hello, can someone please help troubleshoot and verify voltages on this HP board,
It won´t boot, no video, just power LED lights up when button is pressed.
Inductors resistance to ground is:
1R5 =3,4V
2R2=0,0V
1R0=0,0V
R47=11,35V
R24=0,0V
R24=0,0V
R22=0,13V
1R0=0,0V
R33=0,0V...02-28-2023, 09:16 AM -
Hi all,
As the title suggests, how can I be sure that my EC chip is really dead?
I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.
Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard... -
Hello , for some time I was studying Quanta U9x/8x schematics and the option to use both type of screen (LVDS 40 pin / eDP 30 pin).
In some cases to use LVDS screen PCB use converter IC RTD2132/6
Now I found an HP 15 F series U99 mainboard with RTD chip not populated and LVDS 40 pin lcd touch screen
at the same time I have another HP 15 N series with Quanta U92 mainboard and RTD2136 with eDP 30 pin lcd screen (no touch).
Maybe someone more experienced in the subject can clarify if is posible to change type of screen used with some resistors / bios options change.
...11-25-2023, 09:31 AM -
hello guys,
i need help to repair a edm-033 ps2
history : as always hdmi port and usb ports destroyed after unplugged
after change them, ps5 dead too : 1 beep, no blue light. after inspection 1.8v power was shorted, and because of dead panasonic chip. after remove it : no short anymore
so i changed it
now i have got 5v stby,, 3.3v stby, 3.3v power, 1.8v power and no short on them
but the ps5 is dead again : 1 beep, near 10 seconds with power lines and then off, no blue light ...
i don't see any projection of liquid metal on pcb.
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Hello,
can anoyne help me please? I have here one dead HP with Quanta 81 mainboard.
Looks completelly dead - no light near dc connector. It uses BQ738.
results - measured without battery:
1/ACN - 19.8V
2/ACP - 19.8V
3/CMSRC - 19.8V
4/ACDRV - 24.8V
5/ACOK - 3.2V
6/ACDET - 2.8V
7/IOUT - 0V
8/SDA - 3.3V
9/SCL - 3.3V
10/ILIM - 3.3V
11/BATDRV - 3V
12/SRN - 3V
13/SRM - 3V
14/GND - GND
15/LODRV - 0V
16/REGN - 6V
17/BTST - 6V
18/HIDRV - 3V
19/PHASE - 3V
20/VCC...
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