Hi,
Anyone has a circuit diagram for this Samsung Power supply pls?
QP801CS shorted. Blu Cap is not cracked.
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265690}[/ATTACH]Hi,
Anyone has a circuit diagram for this Samsung Power supply pls?
QP801CS shorted. Blu Cap is not cracked.
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image...
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by alltvrepairsToday, 03:58 AM
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by unimatrix93Dear forum,
I'm stuck with this old TV unit.
PSU: 17PW04-1
MB: 17MB62-1
Symptoms:
- Blue LED constantly blinking when connected to AC.
- Only sigh of life is beeping when touching the capactive buttons on the front.
Diagnostics so far:
Checked the PSU output voltages:
12V present
5V present altought its only around 4.2V
3V is present measured 3.4V.
I check TP 202 which is for the short circuit protection: 0.606V on diode mode
Since I met with some vestel models before with similiar symptoms...05-03-2024, 03:18 AM -
by jkrunsHello everyone,
This is my first post after browsing this wonderful treasure trove of knowledge for many, many evenings. I've decided to learn how to fix these things, properly.
My patient is an A2338 Macbook Pro M1 (late 2020).
It had some corrosion around JT710 and JT700 caused by liquid spill, as well as against the protective barrier around the USB-C chips UF000 and UF100. So I took the main board out and cleaned it with a toothbrush and alcohol, then with alcohol in an ultrasonic cleaner. Cleaned the touchbar flex connectors as well. The board looks...04-22-2024, 06:45 AM -
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thank you all for any advice.04-30-2024, 04:36 PM -
by BL4CK0uHello,
i'm trying to understand what is wrong with this laptop. The fans are not spinning and i can't boot to windows (laptop is trying but endless loop on loading)
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Channel: BIOS Requests ONLY!
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by grimacelordHello,
I have an HP 14-dq0055dx laptop here that came in for boot looping. It was previously taken to another shop and they tried flashing a BIOS firmware to the chip, so I cannot take an original dump. For a second or two, a message will come up on the screen that says:
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by Zickko10MODEL:SAMSUNG SENS R590
S/N:ZSMJ93M2700480E
BOARD NUMBER:BA41-01175A
BREMEN -M REV :1 .3{100312} -8...Today, 04:59 AM -
by alltvrepairsHi,
Anyone has a circuit diagram for this Samsung Power supply pls?
QP801CS shorted. Blu Cap is not cracked.
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265690}[/ATTACH]Hi,
Anyone has a circuit diagram for this Samsung Power supply pls?
QP801CS shorted. Blu Cap is not cracked.
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image...Today, 03:58 AM -
by crazycavanpolaroid TQLHD24PR004 no power
hi, my tv no longer starts like dead, no standby led
motherboard : MS36639-ZC01-01
panel : V236BJ1-P01
flash spi: GD25Q64
need usb firmware or to reprogramYesterday, 08:40 AM -
by benwatersonHi All
Been a while since I have been here, and a bit rusty.
I have the above laptop motherboard that was working and now the charging circuit is faulty.
Have 19v in fine until it hits PU4403 - not shorts I can see and thermal cam reveals nothing.
I have swapped out the ISL9538 and also the two mosfets (PU4403 and PU4405). Have 2.8v at the power switch, which pulls low when pressed - charging light comes on and goes straight off
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by trepachkaHello, this Asus laptop model FA707NU-DS74 has password which prevents computer from booting past it.
S/N: R3NRCX04A476126
I extracted current BIOS from a chip XMC 25RU256CXIQ (1.8V) sitting close to the CPU heatsink.
Please, help me remove the password. Thank you....-
Channel: BIOS Requests ONLY!
Today, 01:30 AM -
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by smaniakThe 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....Yesterday, 01:24 AM -
by cookSee the attached drawing of the chip I am trying to identify. I think the last character (the 'H') may actually be the manufacturer logo, but I am not sure.
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by Yehuda170does any one here have SCH & BV for 820-02655? I see it's available on the web
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Channel: Schematic Requests ONLY!
Today, 02:49 AM -
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by fredyjbiPlease help sir, this board does not turn on because VSYS_OUT is 9.2v, I compared it with a normal board VSYS_OUT is 10.2v, I have replaced the PQ101 and PQ102 mosfet and BQ 25700 which is known to be good, but the results are still the same, thank you
VSYS_OUT 9.2v Meter in resistance mode auto range 6M ok
NORMAL BOARD 10.2V
PQ101
PIN 2 20V
PIN 7 0.004V
PIN 6 6V
PIN 5678 0V
PQ102
PIN 567 0V
PIN 9 0.004V
PIN 234 9.2V (VSYS_OUT)
PU101 BQ25700ARSNR
1 VBUS 20V
2 ACN 20,21V
3 ACP 20,21V...Yesterday, 05:30 AM