The monitor goes to sleep when i turn it on - Computers & Internet

it is not just a monitor there is PC there,
no PC stated, they work as TEAM. ok.
that being said, 14year old monitors.
no not SAFE but power saver mode,
also called SLEEP MODE to save power losses, (Energy Star and GREEN )
the manual covers this. 9227-AC1 (you missed typing fully this)
'Lenovo ThinkVision L171 9227-AC1 17" LCD Monitor.' AC1 is non USA. this is very old monitor and all have this OLD style internal sleep mode. covered in the manual. circa 2005 old. most this old are dead now from dead CCLF back lamp tubes. but the manual shows push menu key on front then in the OSD MENUS WE THEN FIND sleep timer (clock) Inside the monitor,
http://www.manualsdir.com/manuals/165841/lenovo-l171.html if the PC is silent the monitor goes to sleep. if the PC goes to sleep wiggle the mouse or hit space bar until PC wakes up. if sleep is bad in PC turn sleep off. if PC is dead, then that is wrong. test the monitor in 2nd PC if monitor works there the monitor is ok, and PC1 is bad.

go to control panel , power options , edit plan settings, there you can change the setting for you display when to sleep or turn of.

go to start,then pc settings,then monitor or power options the to power and sleep and change on plug to 4 hours and on battery to 10 minutes

Unfortunately, this is a standard problem, as when your laptop goes into sleep mode, it shuts off power to the secondary monitor, without giving it the signal to go into sleep mode. You could try digging around your settings, but most likely you'll just need to turn off the monitor when you're not using it.

so if you test the monitor on a known good PC it does what?
fails, then its the monitor
works then its the failing PC

all old HP monitors pre 2010 many had a sleep timer
so push the menu key on the monitor
then look for sleep timer and turn it off,
the monitor defaults to that mode, so dont push reset monitor or bam back to sleep mode it goes. so turn it off again.
all this is in the manual, lost yours, wana read it first?

read page 4.7 see that? (osd +advanced +) power saver OFF

https://www.manualslib.com/manual/418165/Hp-W1907-19-Lcd-Monitor.html?page=25#manual

if that fails to fix it (tested on 2 PC ) the PC1 is bad.
that be a whole other WALL OF TEXt, ask.

On the majority of monitors the monitor goes into sleep mode when there is no input, but to turn off monitors altogether, on most monitors you press the power button to turn off the monitor altogether.

I suggest to mess around with the monitor buttons and see if you can disable it from sleeping from there. If not then try enabling it to sleep on your computer settings. A good restart after any changes is always helpful.

turn off everything and restart computer in safe mode,do this by holding down f8 as you reboot,then go in your setting and remove time limit on sleep mode.

Turn off the "powersaver" feature on your monitor by pressing <menu> then <management>then <powersaver> select off.

Hi

If only the monitor is going to sleep, then it could be a problem with the connection from the monitor to the computer or with the cable.

If the computer goes to sleep and if you are not able to wake it from sleep then check the sleep mode settings and also the power management settings for the keyboard and mouse.
You may also do a system restore if you are not able to wake the computer from sleep.