Read the statement by Michael Teeuw here.
rpi dont wake up my screen anymore
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 i shut down my mirror every night with crontab : 
 " poweroff"
 i 've putted a button on RUN contact to put on the rpibut i dont know why it dont work anymore 
 my rpi dont wake up my screen automaticaly
 my rpi work welle but i need to use my old remote for put on my screen
 my screen is an TV with hdmi cable
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 @seramik what changed? 
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 i changed my screen during a month and i upgrade mm² to last version 
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 @seramik ah, latest version… will need to go to the MMM-PIR folder and do npm install electron-rebuildthen ./node_modules/.bin/electron-rebuildto fix one of the modules MMM-PIR uses 
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 i dont have PIR module, 
 so no MMM-PIR folder ?
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 @seramik sorry, what code runs the i 've putted a button on RUN contact to put on the rpi that code needs to be recompiled 
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 no codes, i use the RUN and PEN holes on the card, 
 exemple but me, i only use one button
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 ok, missed the whole thing… sorry so, you power off the pi with code 
 then hit connect the RUN pin to power the PI back upbut the new(er) monitor doesn’t come back on? 
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 that is right 
 the monitor is the same as before, ( just test another one during one month)
 but before it does work( with old version)
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 my bad @ninjabreadman said in {HowTo} turn on/off your monitor (Time based, PIR/Button, App): @E3V3A Some monitors, but almost all television displays turn off after delay (and then cannot be woken in software). i will put a relai on GPIO and it will work 
 at start( when my run button is pressed) it will shut off and shut on the monitor/solved 
