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1. Reseat gr aphics card. · 2. Clear CMOS. · 3. Check monitor connection. · 4. Replace graphics card. 1720-SMART Hard Drive. Detects Imminent Failure.Related Manual Pages 1801 Microcode Update Error In Dc7600.invalid And Missing Prosesor Trying 2 Get Microcode Update 4 Hp Dc 7800 Small Factor Compaq dc7800 USDT desktop pdf manual download. HP Compaq dc7800 USDT Troubleshooting Manual page 59. Business pcs 1801-Microcode Patch Error. Get Compaq dc7800 - Convertible Minitower PC PDF manuals and user guides by the BIOS, the BIOS will issue a POST warning "1801-Microcode Update Error". You would like to read the general instructions described in the “Emergency Recovery Mode Fix firmware patch 1801 upgrade error in HP UEFI mode. Download the below file and Just follow the given instructions. File Size: 2.86 MB approx. Click the Below Link to Download. Fix Microcode Update