Screenshot PowerShell while remote server is minimized - powershell

Question

I'm currently using the PowerShellscript below to take a screenshot of a file and save it to a local drive. This works fine on my desktop when the excel file is open. However, I'm trying to take the screenshot on a remote server that I have minimized, as I'm running this script there overnight. When the screenshot gets saved to the local drive on the remote server, it's just blank. IF I have the remote server screen open, it works fine. I'm looking for assistance to see if this is even possible. Any assistance would be appreciated.
$app = New-Object -comobject Excel.Application
$app.windowstate= "xlMaximized"
$app.Visible = $True
$app.displayAlerts = $False
$wb = $app.Workbooks.Open("C:\TakeAScreenshotPlease.xlsm")
$wb.Name
$wb.RefreshAll()
Start-Sleep -s 460
[Reflection.Assembly]::LoadWithPartialName("System.Drawing")
function screenshot([Drawing.Rectangle]$bounds, $path) {
$bmp = New-Object Drawing.Bitmap $bounds.width, $bounds.height
$graphics = [Drawing.Graphics]::FromImage($bmp)
$graphics.CopyFromScreen($bounds.Location, [Drawing.Point]::Empty, $bounds.size)
$bmp.Save($path)
$graphics.Dispose()
$bmp.Dispose()
}
$bounds = [Drawing.Rectangle]::FromLTRB(0, 271, 1541, 950)
screenshot $bounds "C:\TakeAScreenshotPlease\FakeFolder.png"