Best place to get Pavilion dv4-2145dx inverter?

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The screen on my wife's HP Pavilion DV4-2145dx recently started flickering, then went dark. Screen still works and the laptop works, the backlight is just out. I've never really shopped around for something like this so I was hoping someone could direct me to a reputable place online where I can buy the inverter for this laptop. Your help is much appreciated! Thanks in advance