I have a 14v reading from the charger to the PR213 , Ive tested the charger it has 19v reading What may be the problem?
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Re: Da0zrwmb6g0 rev g 14 volts reading
PQ22 gate voltage?? Remove PR213 and see you get 19V on pq22 side. Measure resistance on both pads of PR213 after removing the resistor. -
Re: Da0zrwmb6g0 rev g 14 volts reading
Im having 10 mega ohmsComment
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Re: Da0zrwmb6g0 rev g 14 volts reading
From Vin SideComment
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Re: Da0zrwmb6g0 rev g 14 volts reading
Thanks for shared boardview file. I solved my problem...Comment
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Hi everyone,
Brought a non functionnal PS5. Apparently only a bad PSU...
No beep, nothing.
After some tests i found this :
- PSU is fine (12 volts stable)
- 12 volts line is shorted
- DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
- By the way, nothing change. No signal, no power, no beep.
Mesuring all rails with my workbench psu (12 volts input)
- 0.00 amp drawing
- 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is... -
Hello,
Dell Latitude 5420 P137G
Board: LA-K491P REV A01
I have received this laptop which was described as "does not power on or accept charge." Battery shows no sign of charging when charger is plugged in, nor does the board show any signs of life when battery is unplugged and charger is plugged in. No light from the LED at all or any other indications of activity.
Board seems to have no shorts, all power rails are fine and show high resistance.
When charger is plugged in, voltage is present in 3.3V rail but absent in others.... -
I have this 10 amp 0 to 30 volt switching power supply that decided to have a 630 milliamperes draw on it at 0 volts
I open it up to find non brands name capacitors in it
I am not sure how this switching power supply is set up
Could someone please explain how this power supply works
Here is the capacitor ESR results
(1) 47uf@50 volts 0.46
(2) 47uf@50 volts 0.45
New 47uf@50 volts 0.35
(1) 100uf@25 volts 0.34
(2) 100uf@25 volts 0.35
New 120uf@50 volts 0.08
(1) 220@25 volts 0.13... -
Hi All,
Need help.
I have a samsung un60j620dafxza led tv. When I plug it in it has no display, no sounds, and no standby lights.
So I opened the tv and disconnected the power to the mainboard and the backlight powered up. This according to many people says that this is a mainboard
problem. I checked the voltage coming from the stb and I read 1.3 volts on pins 1,3,5 and 7 which are low volts instead of 13 volts which i think the lcd panel
might be drawing too much power from the power supply that it prevents the right voltage going to the mainboard.... -
Laptop name Acer Aspire E5-574G. Processor = i7-6500u. GPU = NVIDIA GEFORCE 940M. Motherboard Model = DA0ZRWMB6G0
This laptop was not powering on at all so I started investigating. The blue light would come on for a second, and then disappear. Fan would sometimes turn on for a second and then shut off immediately, and at other times would not turn on at all.
To start with, about 3 months ago I had no clue about soldering, motherboard schematics, board view, and then I stumbled about this forum and other stuff online. I have never done any of those before. But to ask...
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