Re: dag3dbmb8d0 HP laptop cut off the power supply. 0 reactions
I gave the wrong plate name. The correct one is dag3jbmb8d0 g3jb. Can I supply 19V from the service power supply to the power socket?
magicpc
Member
Last Activity: 01-29-2025, 09:31 AM
Joined: 06-09-2022
Location: Ploty
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dag3dbmb8d0 HP laptop cut off the power supply. 0 reactions
hello, i have a laptop that is dead. When connecting the power supply, its voltage drops from 19.9v to 100mV. I changed the power supply and the charging port, but that didn't help. I measured the output keys and diode drops of about 0.540V.
I have attached a photo of the coil resistance which is very small.
Where to look for the problem?
Nothing is hot on the motherboard.
Motherboard: dag3dbmb8d0 g3jb... -
Re: Acer Aspire V17 on the Newgate_SLS MB N16E 448.06A26.0011
I replaced the above chip and now on the battery slot I have:
1-3 - 0V
4 - 3,3V
5 - 3,3V
6 - 0,290V
7 - 10mV
8 - 10 - 18V
measurement:
Source - drain - 0.530Mohm
Source - gate - 1.3Mohm
Gate - drain - 1Mohm And rising.
Each pin had the same value, so I didn't specify it. Auto range on the multimeter.
Resistance on the old system:
Source - Drain - 0.400 Mohm
Source - Gate - 0.230 Mohm
...Last edited by magicpc; 07-03-2023, 09:45 AM.Leave a comment:
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Acer Aspire V17 on the Newgate_SLS MB N16E 448.06A26.0011
Hello, I have an Acer Aspire V17 on the Newgate_SLS MB N16E 448.06A26.0011 board. The laptop after the turbulence related to the power supply works only on the power adapter and does not charge the battery.
The battery gives a current of about 14mA, on the battery connector I have:
1-3 - 0V
4 - 3.3V
5 - 3.3V
6 - 0.290V
7 - 12mV
8 - 10 - 141mV
Layout from photos:
Red - 141mV
Yellow - 19V
Pink - 15mV
The coil next to the battery socket is 1.7Mohm and 141mV
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Patents for service cables
Hi, will you share your patents for connecting e.g. xbox or ps4/5 to a laboratory power supply? I'm curious how these cables are made. Or maybe you have other patents for connecting other equipment? -
Svod 4 reading emmc
Hello, is svod 4 able to read emmc? Do I need a special board or is it enough to solder into the pinout and insert the other side of the cables into the programmer? somehow especially set the svod? -
Re: Tablet Samsung Galaxy Tab 3 SM-T311 Did not work
Already at the beginning I have a problem with the voltages around the U700. So I have to replace it. Is this system balling?Leave a comment:
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Tablet Samsung Galaxy Tab 3 SM-T311 Did not work
Hello, I have the title tablet that does not turn on. All I want is to recover the data from the disk, but I'm afraid it has died.
The battery is 3.8v, the tablet sometimes uses 0.170A, in a moment it drops to 0A. Sometimes it gets 0.470A but unfortunately it does not respond to the switch. I have not found any short circuits, and nothing warms up on the board. -
Re: LG 42LA6130 did not turn on
Okay, but why the leds do not start on the old power supply? I tried such configurations:
Old power supply + old board - does not work
Old power supply + new board - does not work
New power supply + old board - does not work
New power supply + new board - works.Leave a comment:
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Re: QALA1 LA-7762P What are the coils?
Black probe to ground on the motherboard and red probe to the coil.
Resistance without coil: 9kohm
Coil resistance: 3.9ohm
Coil resistance after desoldering (two probes per coil) 0.09ohmLeave a comment:
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Re: LG 42LA6130 did not turn on
1 it works
2 the bottom half works
3 it works
4 it works
5 it works...Last edited by magicpc; 06-13-2022, 08:14 AM.Leave a comment:
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Re: LG 42LA6130 did not turn on
I will improve the connections on the old power supply. On a different power supply and motherboard, the situation looks like the picture below....Leave a comment:
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QALA1 LA-7762P What are the coils?
Hello, I found the LA-7762P motherboard described as turning on once rather than once.
I checked the coil resistances and the two coils had 4ohm resistances. After desoldering, I already have 9kohm. The only question is what to replace them with? How to find out which coils to use? The diagram and the view of the board did not help me much. Coil marking on R36J 1226F.... -
Re: LG 42LA6130 did not turn on
I hope that was it.
I took a chance and connected another motherboard and power supply. Now you can see the LG logo but the backlight is blinking. It flashes every 1 second....Last edited by magicpc; 06-13-2022, 06:14 AM.Leave a comment:
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Re: LG 42LA6130 did not turn on
Thank you for the quick reply. The problem is I connected the primary power supply and the red led blinked and it's still the same. (it did not flash on the new one except for the first time)
I moved a few emollients to a new power supply, but that didn't change anything.
I probably still have a working power supply with the number LGP474950-14PL2. Can i go somehow?Last edited by magicpc; 06-12-2022, 04:04 PM.Leave a comment:
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LG 42LA6130 did not turn on
Hello
I apologize in advance for my language - I use the translator.
I have a problem with my xxx tv. At the beginning, when I tried to turn it on, the red LED flashed 3 times and silence. I read on the internet that this is a power supply that I replaced with a working one.
After replacing the power supply, the problem was the same, but after a while the TV went out and there is no red LED anymore.
Can you suggest how to diagnose it? I am a beginner and I am just learning.
In the photo below, I tried to emphasize what the voltage situation... -
Re: New Members - please post your introductions here
Hi from Poland.
I work in the IT field and have a passion for everything's that's is electronics related.Leave a comment:
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