Have asus x553ma motherboard in dead condition 19v rail is ok but 3v 5v and all voltages fluctuate on power switch 3v is stable. Help with diagnose this problem
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Re: Asus x553ma no power
Hi. Remove all power. Measure the resistance to ground of each inductor / coil on the logic board.
If the voltage is fluctuating -> measure there resistance to ground to see if there is a short condition.
Next, locate the power regulator for the rails that are bouncing. What is the regulator's topside markings ? Very likely the regulator will have an ENABLE pin.
Power up and measure the voltage to ground of the ENABLE pin. Is the ENABLE pin also toggling ON/OFF ?
Often, a current sense loop will force the regulator to shut off. The current draw is known in advance by the designers and if the current draw is exceeded, the regulator will be shut off.
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Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
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Upon bringing it home and plugging it up, it showed a standby light.
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Assuming... -
Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
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https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hello, I have an issue with the motherboard. Specifically, it doesn't power on, more precisely, the POST initialization doesn't occur.
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,... -
Hello, I have an asus Z97-A motherboard and it doesn't start which was working properly before, the problem isn't related by ram, ram slots or psu (I changed all and nothing work), the exact problem is when you switch it on , it starts and after 1 seconds (no boot or display picture) it's off and then on cycle continuously until you power it off from psu also it's responding to the power switch for turning it off if you keep pressing it 3 or 4 seconds (power button pin has 3.3v) , also when you start it with eatx 12v socket connected this is happening (power cycle also all voltages are resetting...
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