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Have an Radeon HD 7700 running under Windows 10 1903.  Had two 27" LG IPS full HD monitors, running in extended mode.  Worked find for the last 3 years.  Replaced the two LG monitors with two 27" Dell monitors.  computer boots up with two monitors, but af

Question asked by glennjoseph on Dec 11, 2019

Have an Radeon HD 7700 running under Windows 10 1903.  Had two 27" LG IPS full HD monitors, running in extended mode.  Worked find for the last 3 years.  Replaced the two LG monitors with two 27" Dell monitors.  computer boots up with two monitors, but after a minute one monitor goes black (sleep mode) and windows reports only one monitor.  Change back to extended mode, which only last for 10 seconds.  When I reconnect the two LG monitors, they both work as expected. What can be causing this?

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