U2715H, recently won't wake up

Question

I have three Dell U2715H monitors running off single DP cable out of Nvidia 1650 card. I never used to have any issues but recently they started not waking up. I can power the monitors off, reboot and still wont wake up. The only fix I have found is getting PC started and unplugging DP cable for about 5 to 10 seconds. Sometimes it takes twice.  I have reformatted the PC recently (no help) and just tried a MSI RTX 3060 card. Same issue. It's quite annoying and I don't think I could get into BIOS if I needed to as I never see that anymore.

RichMcCabe · Accepted Answer

Wanted to reply back with this. Even though there does not seem to be much for power management settings in the U2715H, doing a reset energy settings (Menu- Energy- Reset Energy Settings) on all three U2715H resolved the issue 100%. I see this is a common complaint about these U2715H so thought I would post this for future reference.

DELL-Chris M · Answer

'recently they started not waking up.'Just prior to the issue appearing had you updated the Nvidia driver? 'I have reformatted the PC recently (no help) and just tried a MSI RTX 3060 card. Same issue.'Did you install that same Nvidia driver? Perhaps test older Nvidia driver versions. 'The only fix I have found is getting PC started and unplugging DP cable for about 5 to 10 seconds.'That normally means that the video card signal had to be reset. Points to the video card driver as possible fault. Many users disconnect DP and use HDMI to see the BIOS. Worth testing. These U2715H released 7 years ago. What are the build dates of yours? Check the rear labels.

RichMcCabe · Answer

Hi Chris, thanks for reply. Not under warranty. These are 2017. The BIOS is the least of my concern really. Was just adding that as part of the issue. I can connect another DVI monitor to do that.

I have updated drivers and as I said just installed a new RTX3060 card with no luck.

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U2715H, recently won't wake up

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