It has 5V, 3.3V. No shorts on coils. Power button works correctly, when pressed voltage drops.
One time turned on. Not sure how.
One time turned on. Not sure how.
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Re: asus x550l wont react to power button
Which board is yours ?Attached Files -
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Re: asus x550l wont react to power button
https://www.badcaps.net/forum/showthread.php?t=88758
When requesting help, please attach a picture of the board with voltage and resistance to ground measurements on all the large inductors after triggering power button.Comment
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Re: asus x550l wont react to power button
..but resistance checks are to be performed always with the power OFF and with NO battery.When requesting help, please attach a picture of the board with voltage and resistance to ground measurements on all the large inductors after triggering power button.Comment
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Re: asus x550l wont react to power button
fixed by removing cmos battery and waited for some time, after few tries it worked. BIOS went mad i guess.
Other problem. trackpad doesnt work. I have second trackpad, and it doesn't work too.
Under windows 10, device manager is not detecting any trackpad. Doesnt work on latest ubuntu and windows 7 install setup.
Asus smart gesture driver is installed (W10).
x550ld rev. 2.0Last edited by mosfetratus; 07-07-2022, 08:46 AM.Comment
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Re: asus x550l wont react to power button
Review the voltages on the J3102 connector.
Most interested in the voltage readings of pins 3 & 4 which are the TP I2C interface pins (SDA & SCL).
Meter in DC volts scale (5 volts or higher is ok).
Red meter probe on pin # 3 of the connector; Black meter probe to ground.Attached FilesComment
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Re: asus x550l wont react to power button
Pin 3 : OK3. - 3.34v
4. - 0.00v
Pin 4 : something is wrong here. This should also be ~3v3.
Remove all power -> check your cabling. Remove the cable for now.
Power up and check the voltage on pin # 4 again. Still 0v ?
If yes, power down again -> meter in resistance mode (lowest scale is ok).
Check the resistance to ground of pin # 4 of this TP connector J3102.
Post the measurements.Comment
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Re: asus x550l wont react to power button
Resistance of pin # 4 = ~0 ohms to GROUND ?? (no power when testing resistance)Comment
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Re: asus x550l wont react to power button
Ouch! Review if you have a visible short on this line. According to the boardview diagram, this is a signal line and should be ~3v3 with no activity. This is common to I2C bus interfaces - the local pull-up performs this task.
The resistance is very low so suspecting that there is a solder short or a bad cap. Hunt the area for clues.
Possible short could be to pin # 5 = GROUND on the same connector.Comment
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Re: asus x550l wont react to power button
https://www.badcaps.net/forum/showthread.php?t=65391
your boardview file is wrong.
pin 4 is ground. Which is correct. No problem with pin 4.
pin 5 is TP_DAT
pin 6 is TP_CLKLast edited by mosfetratus; 07-07-2022, 12:17 PM.Comment
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Re: asus x550l wont react to power button
Ok. So the TP connector = J3101.
What are the resistance readings for pin # 5 and # 6 to ground ?
Also measure the voltage on each pin.Comment
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Re: asus x550l wont react to power button
FIXED
Was bad trackpad + bad cable.
Working trackpad had broken cable [From the laptop with BIOS problems].
Not working trackpad had good cable [From the laptop with trackpad "problem"].Comment
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Hi all!
I've got an Asus FX517ZC on the bench at the moment and I just can't figure out what's going on with it.
Here are its various numbers and identifiers:
Model short: FX517Z
Model long: FX517ZC-HN114W
SN: NANRCX01S57842E
CN: 3SDB 12M
MFD: 2022-10
Motherboard model: DA0NJLMBAE0 REV E
Symptoms:
The laptop's charge light comes on, but when the power on button is pressed nothing happens. No fan spin, no caps lock, no screen or keyboard backlight, nothing.
History so far:
The... -
Hope someone can give me some suggestions on this because i'm at my wits end with it...
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Basically, on mains power, the power button works fairly well. The first time you come to it after leving it sitting (either on charge or not on charge), it might take 2 or 3 presses of the button, but then the laptop boots...07-12-2024, 03:03 AM -
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Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
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Let me start from the beginning, the motherboard suddenly stopped working one day. There are no beep signals from the speaker, and the debug LEDs are not lighting up. After inspecting it under a microscope and using thermal imaging, I didn't find anything that could be damaged.
After that, I began voltage measurements, in which I noticed the absence of VDDQ, VDDP, VTT, and VPP lines. Later, I checked if there is an EN state on these lines,... -
I have i think 4 dead keyboards from laptops in the title...they are very similar...almost the same...and all of them have not working power buttons. All other keys are working...but when you press power button it doesnt short 3.3v to gnd...so you can only do it manually on the keyboard conector with tweezers or similar. I inspected in every detail ribbon cable that is going to the motherboard connector and removed power key button from keyboard to see anything wrong there, but all seems perfect.
Has anyone with more expirience figured where is that power button line getting broken? because...
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