hp elitebook 840 g4 cant connect external monitor

[dqtech]

this laptop have vga and displayport....both port not working like the video, when connect only give standby mode to the external monitor....any solution for this problem?

[Duranitron]

Please check if you have any issue in the device manager particular to display . A blank screen happens when the external monitor is not capable of a higher resolution. Check the highest resolution your external monitor can safely handle. Try to reduce the screen resolution of your internal lcd display specially when you are in duplicate mode. Hope this helps.

[dqtech]

Please check if you have any issue in the device manager particular to display . A blank screen happens when the external monitor is not capable of a higher resolution. Check the highest resolution your external monitor can safely handle. Try to reduce the screen resolution of your internal lcd display specially when you are in duplicate mode. Hope this helps.

there no issue on device manager sir...i try reduce resolution on internal but also same result...it saying "We dint find another display"

[Duranitron]

try other external monitor or vga cable

[Duranitron]

if symptom persist. there maybe issue in your internal display.. try to look at device manager particularly the display section try to screen shot that and post it here

[dqtech]

if symptom persist. there maybe issue in your internal display.. try to look at device manager particularly the display section try to screen shot that and post it here

i already try another other monitor but problem still persist....i think all good on driver also

[dqtech]

or maybe issue with the motherboard?....if yes, what could be the problem ya?

[Duranitron]

are you the first owner of this laptop? does your laptop have an HDMI port? If all has been done to isolate the problem. The problem is inside your laptop.

[dqtech]

are you the first owner of this laptop? does your laptop have an HDMI port? If all has been done to isolate the problem. The problem is inside your laptop.

this my customer laptop...this laptop have VGA and DISPLAYPORT ....but both of them not working...i already try replace vga board but still no luck....read on other article someone said maybe problem is from bios, but im not sure about that....im not flash the bios yet

[mcplslg123]

Boot the PC with external monitor connected and once into windows press "Ctrol+P" and select duplicate. Does the display comes on external monitor?
Disconnect the internal screem and try on external monitor only. Does the display comes on external monitor?

[dqtech]

Boot the PC with external monitor connected and once into windows press "Ctrol+P" and select duplicate. Does the display comes on external monitor?
Disconnect the internal screem and try on external monitor only. Does the display comes on external monitor?

i try both ways, still no display on external monitor sir

[dqtech]

this is different laptop, 840 g3 with i5 6th gen but board size and type is same.....work perfectly on external monitor....customer laptop 840 g4 is i5 7th gen, both port VGA and displayport not working

[SMDFlea]

there no issue on device manager sir...i try reduce resolution on internal but also same result...it saying "We dint find another display"

Turn the scaling back down to 100% for the moment. The VGA is on a daughter board, check the ribbon cable ,leave it unplugged and try the DP again. Are you using a DP or HDMI monitor and are you using a DP to HDMI adapter

[dqtech]

Turn the scaling back down to 100% for the moment. The VGA is on a daughter board, check the ribbon cable ,leave it unplugged and try the DP again. Are you using a DP or HDMI monitor and are you using a DP to HDMI adapter

i already try scaling down 100% but same result also....
i have 2 monitor....1 monitor with 1 vga port....and other 1 have hdmi and DP port....im using direct cable VGA and DP, no adapter...but also same result no display on external

[dqtech]

check the ribbon cable ,leave it unplugged and try the DP again.

i also try this but still no display

[SMDFlea]

check the ribbon cable ,leave it unplugged and try the DP again.

i also try this but still no display

Have a look around the motherboard for a parade multiplex chip ,similar to the one in image, look for the parade name or logo, if you find one post the part number or pictures

[dqtech]

Have a look around the motherboard for a parade multiplex chip ,similar to the one in image, look for the parade name or logo, if you find one post the part number or pictures

got 2 same ic like this sir...same number