smaniak
Senior Member
Last Activity: 06-16-2024, 02:13 AM
Joined: 11-22-2017
Location: Blagoevgrad
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I just replace all capacitors on power supply board and now everything is ok. -
Dell SE2719H - won't start
Hi there!
The power supply is ILPI-393 V.A
The main PCB is ILIF-563 V.A
There was a blow-up capacitor on C865. I chang it, but no luck.
I see that there is a black resistor on R8, but I don't know the resistance of the resistor to change it.
Did someone have a schematic for the power supply board or can you give me some help on this resistor?
On the other side of the resistor is the LED module OZ9998EGN.... -
18V Li-Ion Battery BMS PCB Charging Protection Circuit Board Plate - won't charge
This battery PCB is new but was put in not its original charger, and now the battery won't charge.
First of all BMS chip is without a name. It is 20 pins but no marking.
On this board, I can't understand where B- the line is connected to the board.
Any suggestions about the BMS Chip and other things to look for?... -
Yes You are right!!! I returned TPS51123!
The other thing that I see was that KBC1098 was solder incorectly. So I replaced It with new one.
And now when I plug the charger, the carger switch off for short.
With another scan with thermal camera I faund that PQ205-IRFH7914 is glowing.
I replace PQ205 and now the laptop is starting. BUT the fan is spining at full speed and there is no picture.
When I plug tester on mini pci there is nothing, 00 and no other codes.
My qestion is, is KBC1098 programmabal or not?Leave a comment:
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This is motherboard shcematic.
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/82127-hp-elitebook-2540p-rev-1-0[/url]https://This is motherboard shcemati...-rev-1-0[/url]Leave a comment:
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This is motherboard shcematic....
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This is from the thermal camera.
The hotest one is the resistor.
The other one near to resistor is PU303 - APL5317.
And the far right is TPS51123...Leave a comment:
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I found TPS51123 on one of my old motherboards, and I put it instead of old one TPS51125 /that was on the board originally/. The result is the same, this resistor is still very hot.Leave a comment:
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This is after 100ohm resistor to ground now, without TPS51125RGER....
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I lifted up PD2 and PD8 and still the problem was there. Then I decided to remove TPS51125RGER and now the mesurments aroudn resistors are OK.Leave a comment:
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The resistor is still getting hot, and the voltages are the same....Leave a comment:
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On the 4.4V side, resistance to ground is like 30,68MOhms...Leave a comment:
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HP Elitebook 2540p - WP884AW#ABU - won't start!
The laptop won't start. When plug power supply, on 19V in gives me 0,14A, without turning on the laptop.
I check it with thermal camera, and there is one resistor that is very hot, I change the resistor with new on but the result is the same.
In the attachment there is schematic of the resistor area, and schematic of the laptop.
I can't understand, why this resistor is getting so hot.... -
IDEXX VetLab
IDEXX PN: 98-19386-00...Leave a comment:
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IDEXX VetLab PN: 98-19386-00 .Lines on the screen
Hi I have a touch screen monitor. It work fine for many years, but now It shows its age!
When I turn on the monitor, white lines appear on the display. They jump for a few seconds and then the display goes off.
Can you give me some pointers on where to start with the diagnostics.
There was a trail of dried light brown liquid on the board that the display connects to, as if a capacitor had leaked, but I couldn't find one. I cleaned the circuit board and resoldered the legs where this liquid was, but to no avail.... -
Re: Acer Aspire 5755g bios dump
Thank you!!!Leave a comment:
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Re: Acer Aspire 5755G try schematic, motherboard: LA-6901P
Thank you for the schematic!!!Leave a comment:
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Re: Need schematic for Tryptico 6050a2945701-mb-a01(a1)
Thanks for your reply, but I can't understand what is the name on this element, and where can I find it, like part for buying......Leave a comment:
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Re: Need schematic for Tryptico 6050a2945701-mb-a01(a1)
So on the microscope I found a bowl element /Attachment - DTGV 14.jpg/, but I can't identify it.
It is "DTGV 14", but I can't find what kind of element it is...
Can anyone identify this smd?
...
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Re: Need schematic for Tryptico 6050a2945701-mb-a01(a1)
With ot without schematic I'll try to explain what is the problem with my board.
In Pic1, with red dots I point where I have short to ground.
So I need help to solve this problem...
My assumption is that cpu is gone, but I want your opinion......Leave a comment:
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