M70B Monitor Won’t Power On – Logic Board Failure

[userHHWithIbbb]

Model: LS32AM702UNXZA

This 32" Samsung M70B Smart Monitor is failing to power on. When plugged in, I hear a click from the mainboard, and when pressing the power button, the screen briefly flickers (like lightning), but no splash screen or boot occurs.

Through inspection, I’ve confirmed:

• The LCD backlight works if disconnected from the mainboard.
• All cables and external power are functioning.
• Issue is likely related to logic board/firmware failure.

Looking at forums and Reddit, I see similar issues from other users involving sudden failure of these monitors — no physical damage, just a spontaneous failure of the internal board. This appears to be a systemic issue.

I’m requesting that Samsung investigate this as a potential latent defect and provide guidance or service support — even if out of warranty. This is a premium monitor and failure at this stage should not be acceptable.

[LongHiker · Accepted solution]

@userHHWithIbbb This is a user to user discussion group, it is not a direct contact to Samsung. 

For immediate assistance, one option is to use the Samsung Members app -> Support -> Send text. This will open up live troubleshooting.

Another option is to contact Samsung support via https://www.samsung.com/us/support/contact/