#Requires -Version 5.1
<#
    JbTecWiz Support Centre -- generated fix script

    Fault : Second monitor not detected, or wrong resolution and refresh rate
    Fix   : Prove the cable and the bandwidth
    Source: https://jbtecwiz.com/support/win-hw-monitor

    Run as     : The hardware
    Expect     : 20 minutes
    Risk       : low
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    HDMI, DVI, or anything through an adapter or dock.

    HOW TO UNDO IT
    Nothing was changed.

    This script walks the fix one step at a time and asks before each
    one. Steps with no command are things you do yourself -- it prints
    those and waits. Run with -DryRun to print without executing.

    --------------------------------------------------------------------
    NO WARRANTY - USE AT YOUR OWN RISK

    This script is provided by JbTecWiz as-is and with no warranty of any
    kind, express or implied. You run it entirely at your own risk.

    JbTecWiz accepts no liability for any loss or damage arising from its
    use, including but not limited to data loss, downtime, or configuration
    changes that turn out to be wrong for your system.

    You are responsible for reading this script before running it, for
    satisfying yourself that it suits the machine in front of you, and for
    having a working backup first. Some steps cannot be undone.
    --------------------------------------------------------------------
#>

[CmdletBinding()]
param(
    # Print every step and command without running anything.
    [switch]$DryRun,
    # Do not ask before each step. Read the script first if you use this.
    [switch]$Unattended
)

$ErrorActionPreference = 'Stop'
$script:Failed = 0

function Write-Rule { param([string]$Text)
    Write-Host ''
    Write-Host ('-' * 70) -ForegroundColor DarkGray
    if ($Text) { Write-Host $Text -ForegroundColor Cyan }
}

function Show-Prose { param([string]$Text, [string]$Colour = "Gray")
    if (-not $Text) { return }
    $words = $Text -split "\s+"; $line = "  "
    foreach ($w in $words) {
        if (($line.Length + $w.Length) -gt 74) { Write-Host $line -ForegroundColor $Colour; $line = "  " }
        $line += "$w "
    }
    if ($line.Trim()) { Write-Host $line -ForegroundColor $Colour }
}

function Invoke-Step {
    param(
        [int]$Number, [string]$Do, [string]$Why,
        [scriptblock]$Command, [switch]$Manual, [string]$Shell = "powershell"
    )
    Write-Rule "  Step $Number of 4"
    Show-Prose $Do "White"
    if ($Why) { Write-Host ""; Show-Prose $Why "DarkGray" }

    if ($Manual) {
        Write-Host ''
        Write-Host '  -> Do this yourself, then press Enter to carry on.' -ForegroundColor Yellow
        if (-not $Unattended -and -not $DryRun) { [void](Read-Host) }
        return
    }

    Write-Host ''
    foreach ($l in ($Command.ToString().Trim() -split "`n")) {
        Write-Host ("    " + $l.Trim()) -ForegroundColor Green
    }
    Write-Host ''

    if ($DryRun) { Write-Host "  (dry run -- not executed)" -ForegroundColor DarkGray; return }
    if (-not $Unattended) {
        $a = Read-Host "  Run this step? [Y]es / [S]kip / [Q]uit"
        if ($a -match "^[Qq]") { Write-Host "  Stopped at your request."; exit 0 }
        if ($a -match "^[Ss]") { Write-Host "  Skipped." -ForegroundColor DarkGray; return }
    }
    try { & $Command }
    catch {
        $script:Failed++
        Write-Host ("  Step $Number failed: " + $_.Exception.Message) -ForegroundColor Red
        Show-Prose "The rest of the fix may depend on this. Read the write-up before carrying on." "Red"
        if (-not $Unattended) {
            $c = Read-Host "  Carry on anyway? [y/N]"
            if ($c -notmatch "^[Yy]") { exit 1 }
        }
    }
}

Write-Rule
Write-Host '  Second monitor not detected, or wrong resolution and refresh rate' -ForegroundColor White
Write-Host '  Prove the cable and the bandwidth' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: low   Reversible   20 minutes'
Write-Host ''
Show-Prose 'No warranty. Use at your own risk - JbTecWiz accepts no liability. Read it before you run it, and have a backup.' 'DarkYellow'
Write-Rule

if (-not $Unattended -and -not $DryRun) {
    $go = Read-Host '  Ready? [y/N]'
    if ($go -notmatch "^[Yy]") { Write-Host "  Nothing was changed."; exit 0 }
}

Invoke-Step -Number 1 -Do 'Read the monitor''s reported name and serial. If nothing is returned, the EDID read is failing and it is a cable or port problem, not a driver one.' -Why 'This is the cleanest test available without opening anything. A monitor that is physically connected but returns no EDID has a broken cable, a dirty port, or a passive adapter that does not carry the data pins.' -Command {
    Get-CimInstance -Namespace root\wmi -ClassName WmiMonitorID | ForEach-Object {
      [PSCustomObject]@{
        Name   = -join [char[]]($_.UserFriendlyName   | Where-Object { $_ -gt 0 })
        Serial = -join [char[]]($_.SerialNumberID     | Where-Object { $_ -gt 0 })
      }
    }
}

Invoke-Step -Number 2 -Do 'Swap the cable for a known-good one of the correct standard. A 4K 60Hz signal needs HDMI 2.0 or better and a cable rated for it -- an older cable will give 4K at 30Hz or nothing.' -Manual

Invoke-Step -Number 3 -Do 'Connect the monitor directly to the machine, bypassing docks and adapters entirely, to establish whether the dock is the fault.' -Manual

Invoke-Step -Number 4 -Do 'Check the graphics driver is the vendor''s rather than the Microsoft Basic Display Adapter, which supports one resolution and no multi-monitor.' -Command {
    Get-CimInstance Win32_VideoController | Format-Table Name,DriverVersion,CurrentHorizontalResolution,CurrentRefreshRate
}

Write-Rule "  Confirm it worked"
Show-Prose 'The monitor is named correctly in display settings and its native mode is selectable.' 'White'

Write-Rule
if ($script:Failed -gt 0) {
    Write-Host ("  Finished with " + $script:Failed + " failed step(s).") -ForegroundColor Yellow
    Show-Prose 'Read the full write-up at https://jbtecwiz.com/support/win-hw-monitor' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Nothing was changed.' 'DarkGray'
Write-Rule