Computer : HP PAVILION 23-b010ef ALL-IN-ONE (http: // h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03527111&DocLang=en&docLocale=en_US&jumpid=reg_r1002_usen_c-001_title_r0001) Motherboard ("pegatron" IPISB-AB (Leeds-G)) (http: // h20564.www2.hp.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-c03340922) Hi all, I had to reinstall my OEM since I had lot of troubles due to bad hard drive and so on, so I decided to reinstall everything and bought a brand new HDD in the mean time... Once my WIN7x64 was fully installed, I went through HP website to download all the drivers required, as well the BIOS driver. I tried and installed each driver but for all of them, I had a popup with an error (999 if I don't mistake) and saying that the driver is not compatible and so on... Okay ! Then I decided to don't bother with step by step install and drivers research on the web, so I retreived my original CD restore and switched off the computer to start through the CDROM. BUT, once it started, I could hear the CD running and maybe the computer was installing, I don't really know as all I could see is a BLACK SCREEN, not even a cursor, nothing at all, and no sound as well, no bips nothing!!!! Since this time, I have this black screen all the time, tried to flash ths BIOS, no success... Discovered through HP ftp server that the bios file I downloaded from their website is CRITICAL , Could be the reason so.... I cannot even test my graphic card as it is integrated to the mobo, and as it's a ALL IN ONE, I can't test the screen as well (no hdmi or video port). Please if you have an idea of how I could repair, or find the fault on my comp, please let me know. Many thanks in advance.