@Smithmyster85 Good day, 

Please disable power save on powerline device first:  

https://www.tp-link.com/support/faq/2018/

When PA4010 lost no power, does it properly connected to the wall socket tightly? You could try a different wall socket for it as well.

Btw, may I know this only happen on 1 PA4010, or both PA4010s? 

@Solla-topee 

Hi, I have downloaded the utility but it is not picking up any devices and just states 'no device connected'. I've tried add device and refreshing but its not bringing anything up? Both PA4010 turn off so I expect I do need to disable power save mode but how can can I do that if the devices are not recognised on the utility?

@Smithmyster85 Hi,

Thank you for your reply~

Please make sure you connect a PC to PA4010 by Ethernet cable and let us know which Leds are On that powerline unit at that time. 

You could try another PA4010 and see another one is detected by PC or not. 

If still the same issue,may I have a photo of the IP address of your PC/ Ethernet adapter: https://www.tp-link.com/support/faq/838/

Can you share me a link of the tpPLC Utility you have downloaded and also  let me know the Windows version of your computer, thank you

@Solla-topee Ok so I connected via Ethernet cable and the devices appeared in the utility app. I've disabled the power saving mode on both the TL-PA4010's but the other devices, which is part of the first set up, is password protected and I don't know what the password it. I've tried admin but that doesn't work? I don't think that one turns off so problem might be solved but how do I reset the password if I need to access the settings on that one?