If you open Excel and see that the entire work area (i.e. all cell ranges) is displayed in full white, it could be caused by several different reasons. Here are some possible reasons and how to fix them:
Sometimes, if the zoom setting of Excel is not correct, it may cause the display to be abnormal. Try adjusting the zoom to see if that fixes the issue.
Find the zoom slider in the bottom right corner of the excel window, try dragging left or right to adjust the zoom ratio.
Alternatively, tap the "View" tab and then "100%" or "Fit to Screen" to reset the zoom.
If you accidentally freeze the pane of the entire worksheet, it may also lead to not seeing the cells.
Tap the View tab, and then in the Panes group, tap Freeze Pane, and select Unfreeze Pane.
It could be that the current worksheet doesn't have any content, or the scrollbar was accidentally dragged into an empty space.
Try scrolling back to the start area of the worksheet, or click the worksheet tab in the bottom left corner to switch to a different worksheet view.
Some display issues can be caused by Excel's graphics hardware acceleration feature.
Go to "File" > "Options" > "Advanced", find the "Disable Hardware Graphics Acceleration" option in the "Display" section and tick it, then restart Excel.
If none of the above methods solve the problem, it may be that there is a malfunction in the Excel software itself.
Try restarting your computer and then reopening Excel.
If the problem persists, consider repairing the Office installation. Find "Programs and Features" in the Control Panel, select Microsoft Office, then tap "Change" and select "Repair".
If you're using a multi-monitor setup, make sure the Excel window is on the active monitor. Sometimes, the excel window may be moved to an inactive display area by mistake.
If all of the above steps don't resolve the issue, you may want to consider reinstalling Microsoft Office after uninstalling it. Before proceeding with this step, make sure that you have enough backups in case you lose any important documents.