ReadyNAS NV+ v1 - corrupt frontview screen not fixed by factory reset

I've got the page loading properly now, but I didn't pinpoint the issue.  Somewhere in the following steps, it got corrected.  Sry can't be more specific.

Summary of issues and tries:

Corrupt settings page above appeared in both Firefox (49.02) & iexplorer (11.0.96), prolly unrelated to power supply failure. It appeared correctly in Android devices on the same LAN.

This was NOT corrected by:

• Firefox in safe mode
• cleanup and reinstallation of java
• uninstallation of Kaspersky
• blockage of (notorious) Kaspersky javascript injection
• Reinstallation of ReadyNAS OS
• Factory reset of ReadyNAS
• Windows (Win7 x64) rebooted with unessential services disabled.

The setup page did appear normal in mobile device on same LAN (Firefox for Android), and was also normal in a newly created profile on the same desktop as above. I setup the ReadyNAS through the new windows profile and upgraded it to the latest firmware (4.1.15).  This did not appear to correct the issue for the old profile.  I then went through the process of migrating the old profile to the new which involved taking ownership of user file directories and copying them over.  When that was complete, I reloaded Frontview in the new profile and it appeared corrupt again.  After pulling out a few chunks of my hair, it occurred to me that the browser cache was copied over as well, so I cleared it and Frontview loaded correctly for the first time in this machine since the problem started.

The thing is, when I went back to the original profile, cleared the cache, and tried again - it loaded normally there as well.  So though I thought I was being careful to clear the cache at every change, I may have missed it somewhere near the end.  Either that or taking ownership of the user files via another profile corrected something - not likely, imho.  Regardless, I don't know exactly what fixed it.

I'm copying files back to the NAS now as I type.  Windows reports 19+ MBps transfer speed and task manager shows a nice smooth graph. I'm a happy camper.

This new power supply, unlike the 2 prior units, has it's own fan.  While that might prolong it's life, I'm planning on upgrading this unit before the next failure and relegating it to a backup role.

My thanks to StephenB for helping out.