# Advanced POS UI Screen Issues

This troubleshooting guide will be helpful if an existing Maitre'D database is upgraded to version 7.08.000.410 or later for use with the Advanced POS User Interface (HTML POS).

Legacy preferential screens and Sreen Layouts can have defects that would prevent the Advanced User Interface from working correctly. These defects may even prevent the Advanced POS from loading properly.

***

### Symptoms

* The POS will not start in Advanced POS UI mode, but does start in Legacy POS UI mode.
* In advanced UI mode, the POS hangs, becomes unresponsive or crashes when specific screens are accessed.
* In advanced UI mode, the POS hangs, becomes unresponsive or crashes when logging in with certain employees.
* Some Preferential Screen or Screen Layout buttons look awkward, especially those located near the edges of the screen.

***

### Solution

To resolve these issues, follow the steps below:

1. Temporarily revert to the Legacy POS User Interface. (See below)
2. [Locate and repair buttons expanding beyond the screen boundaries in Preferential Screens and Screen Layouts.](/payfacto-knowledge/maitred-pos/maitred/maitred-advanced-pos-user-interface-html-pos/troubleshooting/locate-and-repair-expanded-buttons.md)
3. [Locate and repair (or delete) overlapping buttons in Preferential Screens and Screen Layouts.](/payfacto-knowledge/maitred-pos/maitred/maitred-advanced-pos-user-interface-html-pos/troubleshooting/locate-and-repair-overlapping-button.md)
4. [Re-enable the Advanced POS User Interface.](/payfacto-knowledge/maitred-pos/maitred/maitred-advanced-pos-user-interface-html-pos/enabling-the-advanced-pos-user-interface.md)

***

### Revert to the Maitre'D Legacy POS User Interface

1. Logon to the Maitre’D Back-Office with appropriate credentials. (Distributor or System Owner)

<figure><img src="/files/NkOsJJ3iBAqJ7cqeFmnn" alt=""><figcaption></figcaption></figure>

![Maitre'D Logon Screen](https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/MaitreDCommon/MD_LogonScreen.gif)

2. Start the Point of Sale Control module.

![Back-Office Icon - Point of Sale Control](https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/MaitreDCommon/ICON_PointSales.svg)

3. Click on the View menu and select the Options... option.

![View menu - Options...](https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/POSControl/View-Options/01-ViewMenu-Options.png)

4. The Point of Sale Control module's options window opens on the Configuration branch.

![Point of Sale Control > View > Options > Configuration](https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/POSControl/View-Options/02-Configuration.png)

5. Click on the POS sub-branch and **disable** the Use advanced POS UI option.

![Disable "Use advanced POS UI"](https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/Chap05/Troubleshooting/AdvancedPOSScreens/01-DisableAdvancedPOSUI.png)

6. Click OK. You will be asked to create the workstation data. Click OK to proceed. The entire process could take from a few seconds to a few minutes, depending on your system's performance and the number of workstations on your Maitre'D license.

<div><img src="https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/Chap05/AdvancedPOS-UI/UI-Options/01-MakeData.png" alt="Create Workstation Data Dialog" height="152" width="409"> <img src="https://documentation.payfacto.com/POS/MaitreD/HTMLPOS/assets/images/Chap05/AdvancedPOS-UI/UI-Options/01-MakeDataProcess.png" alt="Create Workstation Data Processing"></div>

7. The options window will close, and you will be back to the Point of Sale Control module.

At this point, the POS workstations should automatically restart with the Legacy POS User Interface.


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