Intermittent Power Issue on Asus X553MA – CPU Voltage Drops ftom 0.89V to 0V

[bajdik]

Hello,
I have a problem with an Asus X553MA motherboard. Sometimes the system works fine, but other times the CPU voltage drops to 0V. In most cases, the laptop reboots after a few seconds due to the voltage drop.
Occasionally, it shows the ASUS logo or boots into the BIOS. Sometimes it can stay in the BIOS for hours without issue.
I checked the board with a thermal camera, but I couldn't find any overheating or leaking capacitors.
Unfortunately, I don’t have access to the schematic.
It seems to me that when I bend the board, something changes.
Could this indicate a cold joint somewhere in the power supply area?
Or perhaps an issue with the processor?
Has anyone experienced a similar issue or has any idea what might be causing this?
Thank you for any help or suggestions.

[bajdik]

New info:
The issue is 100% mechanical.
When I press the board underneath the RAM slot, the laptop works fine.
As soon as I remove my hand, it shuts down.

It looks like there’s a cold joint or cracked trace in that area.
Any advice on what component might typically cause this on an Asus X553MA?

Thanks in advance for any help!

[mon2]

Really could be anything. Suggest to consider to flux and gently reflow this area you are flexing. Be cautious of the air pressure so parts do not go flying. Keep the temp low enough that plastic parts do not melt. Also, capacitors can explode under heat so need to be very careful. Where possible, use a normal soldering iron to resolder the joints but even this method will require great care to avoid solder shorts, etc.

Could the issue be with the RAM socket and socket pins themselves? Inspect them first.

[bajdik]

ANX1121 near LVDS -cold joints .. It is weird, but it was the problem :-) Resolder and works perfect.