I just answered you here:  https://www.dell.com/community/Optiplex-Desktops/Optiplex-7010-graphics-upgrade/m-p/8020036#M53264  However, you have more info in this thread, so lets keep this one going.  Starting a new thread is the way to go for this situation anyway.

Is anything working?  Just double-checking - Your TV has VGA?  I take it this is all onboard graphics?

regards to brad who guided the discussion to a new thread.

re: DP to HTMI convertor not received and hoping this is the problem

indeed that would be the chief suspect for now.  I would assume you are able to get good VGA video on LG TV/ monitor.

DP to hdmi conversion is not as simple as one would think.  when possible avoid video port converter. 

7010 MT Video • 15-pin VGA connector
• two 20-pin DisplayPort connectors

your two Dell monitors DELL U2312HM Monitors do have DP in port.  so try straight DP to DP cable.

it does not seem the Dell monitors have HDMI either, so not sure how you did it.

Hello

My setup is as below from the onboard graphic which I am able to control from the Graphics Control but this only allows me 2 monitors including the VGA, my question is how do I get 3 monitors, did not expect this when I bought the DELL MT 7010, my previous setup I had the 3 monitors including VGA on Windows 10

Dell Optiplex 7010 MT Core i7-3770, 16GB, 240GB SSD + 2TB, DVDRW, Windows 10 Pro Mini Tower (Renewed)

2 x DELL U2312HM Monitors

1 x LG 22LG3050 TV/Monitor

Connections

2 x DP Leads to Dell Monitors

1 x VGA Lead to 22LG3050 TV/Monitor 

Regards

Jim D 

Sounds like only one of the two DP gives you video signal.  Did you test each DP port with each Dell monitor?  If only one of the DP 1 and 2 of 7010 works, is it always the same port?  Forget about the vga port for now.  The question is whether the pc can only output one DP signal at a time, or whether one of the two DP port is defective.

I know you said you had the setup working before.  Covering the bases, currently, did Win10 detect 3 monitors?

Validated soluton is

Dell Nvidia Quadro T400, 2GB, 3 mDP
Full Height - Cus Kit

3 x mini DisplayPort 1.4

https://www.dell.com/en-us/work/shop/accessories/apd/490-bgzt/

I just completed connecting my 7010 MT to a monitor and a TV, with help from these forums. OP may find my experience of help.

https://www.dell.com/community/Monitors/Video-card-for-two-monitors/m-p/7881015#M135109

Hello  Full history and more details, thanks

I have purchased the DELL System below to replace my ageing Desktop 3 x Monitor system I had for years and after many hours and days attempting to get the 3 monitors working have failed. 

I have done the following before repeatedly following the Dell recommended configuration on this Web Page without any luck. 

 Updated Windows 

Updated DELL Drivers 

Updated Intel Drivers 

Re-Installed Windows 10 

Purchased DELL U2312HM (Analog - VGA) Monitor 

 Windows detects 3 monitors between both digital x 2 and analog x 1 monitors but it will only ever show 2 monitors. 

 Hope you can help. 

Regards 

Jim Davis 

 Dell U2312HM (Analog - VGA) 

Dell U2312HM (Digital - DisplayPort) 

Dell U2312HM (Digital - DisplayPort) 

 Intel(R) HD Graphics 4000 

 Dell Optiplex 7010 MT Intel Core i7-3770,  

16GB,  

240GB SSD + 2TB,  

DVDRW,  

Windows 10 Pro  

Mini Tower 

No thanks, its more than the setup!!!!!!!!!!!!!!

For all DELL 7010 7i Intel 4000 Graphics here eventually is the solution to 3 x Monitors, forget the DELL Forum Card sellers and phonies this fellow is the real deal and I thank him greatly, why DELL could not put this out is beyond me, I don’t work for DELL!!!

https://forums.techguy.org/threads/3-monitor-setup-for-dell-optiplex-7010.1226442/