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Black screen Windows 7 before log in with AMD Radeon HD7800

Question asked by jadeco on Sep 20, 2015
Latest reply on Sep 26, 2015 by jadeco

Good afternoon

 

I've update Windows 7 to the latest version in order to migrate to Windows 10 so as graphic card drivers to 15.7.1 version but now I've a problem. Everytime I try to turn on the PC one black screen appears and nothing happens (this is before log in screen)

 

I was looking through internet and forum for possible solutions but none of them works. I listed below what I've tried.

 

- I've tried with old drivers and black screen persist

- I've tried with Windows + P but black screen persist

- I've tried with another screen but black screen persist

- I've tried to connect with Teamwiever but computer doesn't start

- All tests were made with and without catalyst program

- I've tried to format and install again everything but the problem persist

 

I only get to start when I delete drivers from AMD and work with VGA from Windows but this is not a solution because I can't play or do something

 

Edit:

 

Added the info requested

 

DESKTOPS:

 

 

Operating system -> Windows 7 Pro 64 bit SP1

Processor -> Intel Core i5-2500 K CPU @ 3.3 GHz Box Socket 1155

Graphics card(s) ( exact card..not the series) -> Gigabyte Radeon HD 7870 2 GB GDDR5

Overclocking? -> No

Power Supply ( wattage,manufacturer, and model number ) -> OCZ Fatal1ty 550W Modular

Have you checked for a Motherboard bios update? -> Yes is update. Asus P8Z68-V LX

Windows Update current? 'Optional' updates installed? -> All update including optional updates

When did the issue first appear? -> When installing driver update

Steps you have taken to correct the issue -> Mentioned before

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