hp envy x360 15m-ed0023dx won't turn on

[techneer]

hp envy x360 15m-ed0023dx won't turn on

My hp envy x360 15m-ed0023dx won't turn on; no  lights or screen display or fan noise: completely dead. The power jack lights up when plugged in and I can detect voltages on the motherboard from the power jack to the battery, which also shows power (over 12VDC). The one fuse I located (marked fu2) has continuity and the power button* (integrated in the keyboard) checks out good as well. I tried a hard reset a couple of times but no luck. Also tried pulling the ram and replacing one by one. No change. The power supply checks out good. At this point I'm thinking it's a bad motherboard so I ordered one.
This is a little difficult to believe since the laptop isn't even 2 years old. But unfortunately out of warranty.
How I checked the power button

First I separated the palmrest/keyboard assy from the screen. Then I placed a foam rubber "foot" on the power button.

Then I flipped the assy over so it rested on the "footed" power button which activated it and enabled access to the motherboard keyboard cable. In the picture the motherboard is removed, with the keyboard cable taped down with pin side up. Using a multimeter equipped with needle-sharp (fine-tipped) probes, I tested the pins in pairs (figuring the power button involved two pins) until I discovered the relevant pair, counting from the left pins number 13 and 14, which showed continuity, so the button is good.

Update after installing supposedly good replacement motherboard and after doing a hard reset, I was able to start it, with fan running but no screen display. However, after managing to start it a couple of times with no display or error beeps, I was unable to get it going again. I rechecked the battery and power supply = both good. I then tried a new power jack, but no difference. I removed the memory and put them back in one at a time, and also no memory at all to see if I could get a beep error, but no luck. At this point I'm perplexed and will go study the service manual to see if there is any secret procedure necessary to start the computer (like, does the back cover need to be in place for it to start?). Will check back later. If anybody has any ideas, I'd appreciate you sharing...

[TitaniumCurls]

I don't have any answers for you, but am having the same problem as of this morning with my 15m-ee0023dx. Was working just fine last night, but as of this morning it won't turn on -no fan sounds, black screen, etc. Had a full battery last night, too, so even if it were a power cord issue, it should still have some juice today! Really frustrated & wishing I'd extended the warranty (ended 10/26/2021, so not even 6 months ago *sigh*)

Were you able to resolve your issue & get your laptop working again?

[Erikpaul80]

To make it short and sweet after I had the same issue I had tried everything from pulling the battery plug and plugging back in after removing the back. Which would only work until the next time I power down. After about 3 months of TS I found the Intel sensor setting that needs to be disabled. I have a YouTube video that will help or I can describe more let me know.  I stressed that this is the permanent solution to fixing this issue.  HP take note you should send me a check for this lol.  https://youtu.be/oMPpnJsBzBw

[TitaniumCurls]

I'm absolutely going to try this, thank you! If I'm understanding correctly, I just need to pull the battery first to get it to per back up initially & then kill the sensor?

Any thoughts on if upgrading the ram while I've already got the back off & battery disco'd anyway is a terrible idea or a brilliant one? I've had the sticks here for months, just haven't had the time or the will to pull it apart ?