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for 64 bit windows 10
First, find the hardware lds of microsoft basic display adapter driver
Open settings->system->display->advanced display settings->display adapter properties
On the adapter page, click properties button
On the properties window, go to details
Select the hardward lds entry at click down list
and copy the value, the value is like that
PCIVEN_1002&DEV_7145&SUBSYS_20031028
Second, Download the 64-bit vista ati x1400 driver from
http://support.lenovo.com/us/en/downloads/ds004138
Extract the package and enter the folder
PackagesDriversDisplayLH6A_INF
edit CH_49739.inf and find X1400
At the right of all “ATI Mobility Radeon X1400”
replace the hardware lds value with the lds value of microsoft basic display adapter driver that you find at the first step.
save the file.
Third, Install the driver at Disabled driver signature enforcement mode
Open settings->Update & recovery->Recovery->Advanced startup
Click “Restart Now” button then
Select Troubleshoot->Advanced setup->Startup Settings and press Restart
Press 7 number key corresponding to “Disable driver signature enforcement” entry.
After the computer restarted, Open settings->system->display->advanced display settings->display adapter properties
On the driver page, click Update Driver... button
Then select 'Browse my computer for driver software'
Next click the browse button at the right of a search box
Find and select the CH_49739.inf file you edited before in the extracted folder
You will recieve a warning window that warns you the driver is not signed, ignore it and continue
Finally, you installed the ATI X1400 driver and the display is on the full screen reselution mode.
Amd Radeon Hd 7800 Series Driver Update Windows 10
How To Update Windows 7
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