Does your gmail chat box disappeared from the left side of your gmail account? There are two possibilities for the disappearance of google chat;
- You might have logged out of chat: If you have logged out of google chat, you can easily sign back in by clicking the 'sign into chat' link on the left side, just below the drafts,sent mail and other stuffs.
- Your gmail chat has completely disappeared due to a settings change: In this case, you might have accidentally turned of the chat feature. To turn it back on go to Settings (which is at the top right hand part just below your google plus profile picture). Then click the tab Chat and then click on 'chat on' and save the changes. Wohooo the chat box is up once again.