Hey all,
I've got an ASUS laptop (Asus X409DL Rev 2.0) that had a little liquid spill on it however the majority was on the daughter board for the I/O stuff which is connected over a ribbon cable which I have disconnected for now. A small bit of liquid did however get onto what schematics and boardview show is a DC step down IC; a Realtek RT8249CQGW - markings: 2N=. There is no short on the main power rail as I have 19v with the charger plugged in however I have no other power, standby or always on rails anywhere on the board. Looking at the datasheet for this IC I want to sanity...
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-
05-01-2024, 05:49 AM
-
Hello,
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)
Here is the symptoms that i have :
- Takes 20s to display something when power button is pressed
- F1/F2/F9 access ok, F10 hangs, nothing after
- Can update the bios and do the bios recovery, but didn't solve the issue
- Tried CMOS clear, same, no change
I suspect of course the bios chip, but is it a software or hardware issue, i don't know that"s why i'm asking...04-30-2024, 02:37 AM -
I have tried different ways to do it myself but failing
Its a Elite DragonFly
SN: 5CG1120KDW
Product number
6FW22AV
Any help would be appreciated...05-03-2024, 09:22 AM -
Hi all,
I was looking to upgrade my main multimeter (Asita MD591) with something that has more features. I'll use it mostly for board diagnostic and diy repairs. I've been eyeing out many of those multi-function ones from Aliexpress but can't seem to make my mind up. Here are the features that I'm looking after:
- Autorange
- DC volts up to 30V
- Accurate Resistance
- Diode test (Beep mode)
- Frequency up to 200MHz
- Capacitanze up to 5000uF
- as cheap as possible
Other functions are not needed but those which are needed...Yesterday, 09:54 AM -
I bought a T12-958 recently with an M8 handle and until now it has worked very well. The tip wasn't earthed but that was easily resolved.
Now, whenever it is switched on, it heats up to about 70*C then shows an [INVER] error on the screen and stops. In order to fix it I have to either unplug and re-plug the handle, or unplug and re-insert the tip from the handle. While doing that it changes to [ERROR], then it finishes heating up and works perfectly. Until it's turned off, after which it will show [INVER] again next time it is turned on.
Any idea what the problem is?Yesterday, 01:36 PM -
I like to get one on mouser/digikey along with a order i plan to place
i have 2 breadboards one from ebay w/ horrendous contact resistance (to the point on NC)
and another from ali-express that feels like i am going to break my micro controller putting it into the thing
any suggestions? (note that i am not spending $50 on a 3m board)04-29-2024, 08:50 AM -
Hello friends,
Please share this schematic if you have,
EPK50 LA-G07EP REV: 2.0 (HP)
Thank you.Today, 02:54 AM -
i want to program a W25Q40CL chip but looks like it won't get erased neither programmed
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265889}[/ATTACH]
Any help ?i want to program a W25Q40CL chip but looks like it won't get erased neither programmed
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3265889}[/ATTACH]
Any help ?...Yesterday, 10:40 AM -
Hi, i have a Dell 3681 SFF, with its original bios the led blinks 3,6 (some bios error). i tried with a clear me version from another site and it was ok, it gave image but entered manufacturing mode. tried entering service tag but it can't be saved and i can't exit manufacturing mode. can anyone help me with a fix for my original bios file? i attach it here, ST: 3FQ2SF3...Yesterday, 12:12 PM
-
Hi Good peoples;
Been working on a turtle beach Velocity one flight controller; The slide pot for the throttle (black) isn't calibrating properly, it will register the axis with some wriggle until pressure is released;
Does anyone know the specifics for these Potentiometers?? I have attached photos;
Board number is LBX-19500，
C-V1.1 202011
please and thanks as alwaysToday, 02:19 AM
-
Please 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 ohm ok
NORMAL BOARD VSYS_OUT 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...Yesterday, 10:48 AM -
Shown in picture, trying to replace a MOSFET and looks like I knocked this off, in guessing it's the same as one next to it. Has 1.8 Mohms. Any way to bypass it? It's on the hot side
The component circled is the one there, the arrow is I think another of same component?Yesterday, 11:47 AM -
Hello friends,
Please share this schematic if you have,
EPK50 LA-G07EP REV: 2.0 (HP)
Thank you.Today, 02:54 AM -
Hi Good peoples;
Been working on a turtle beach Velocity one flight controller; The slide pot for the throttle (black) isn't calibrating properly, it will register the axis with some wriggle until pressure is released;
Does anyone know the specifics for these Potentiometers?? I have attached photos;
Board number is LBX-19500，
C-V1.1 202011
please and thanks as alwaysToday, 02:19 AM -
Hello all,
Am trying to figure out this backlight issue with this A1990 Macbook Pro.
Tests performed:
There is no backlight even with a good screen.
Backlight IC is receiving the correct support voltages.
Fuse F8400 ok
Current sense resistor R8400 ok
Backlight IC is receiving 3.3V on enable pin.
Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
Backlight IC receiving 5V from PP5V_G3S
Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
I2C_BKLT_SCL and I2C_BKLT_SDA both measure...Yesterday, 10:23 PM -
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....05-05-2024, 01:24 AM -
Hi all,
I was looking to upgrade my main multimeter (Asita MD591) with something that has more features. I'll use it mostly for board diagnostic and diy repairs. I've been eyeing out many of those multi-function ones from Aliexpress but can't seem to make my mind up. Here are the features that I'm looking after:
- Autorange
- DC volts up to 30V
- Accurate Resistance
- Diode test (Beep mode)
- Frequency up to 200MHz
- Capacitanze up to 5000uF
- as cheap as possible
Other functions are not needed but those which are needed...Yesterday, 09:54 AM -
I created a supervisor password for my laptop a while back and I forgot it. It can't be reset by resetting CMOS. Can I extract it from a BIOS dump or through another method without a bios/eeprom programmer?05-05-2024, 09:10 PM
-
Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey.
I want to know if there is any post in this forum which explains my questions. [B]A)[/B] [B]When, where and how do I know when X voltage line is input or output. Example: [/B]
[URL=filedata/fetch?id=3266119&d=1715040463][ATTACH=JSON]{"alt":"Click image for larger version Name:\timage.png Views:\t0 Size:\t151.9 KB ID:\t3266119","data-align":"none","data-attachmentid":"3266119","data-size":"thumb"}[/ATTACH][/URL]...Yesterday, 08:11 PM -
please i need unlock BIOS unowhy Y13 2021
Production year : Aout 2021
Model : Y13G011S4EI
Motherboard : EM_IG116_200b_ene_F_V1.0...Yesterday, 03:59 PM