Inspiron 24 - Model 3459 Series - Screen Flickering

​I have a Dell Inspiron 24 - Model 3459 Series all-in-one desktop. Last few days the screen started flickering (sometimes even at the stage of booting the system). Hence I had visited the Dell Service center in Mumbai (India), who said that there is some issue with the screen (& not with any software) and the same need to be replaced. Unfortunately, it is being a 5 year old system, the screen is not readily available (even with Dell, Mumbai). It is totally unfair that Dell is unable to provide spares for a 5 year old system. Like other conventional desktops, if there is any issue with the screen the same can be rectified easily by replacing it with other monitor but this is not possible in all-in-one desktops. Hence, you have no other option but to scrap the system???? Since all-in-ones are comparatively costlier than the conventional desktops I personally feel that the manufacturer shall provide longer support to such systems. Can anyone from Dell help me to resolve my issue ASAP. Thanks in advance.​