Hi, I tell you the problem: I receive a cabinet with this message every time I start: "The file is possibly corrupt. The file header checksum does not match the computed checksum" I take out the battery, the measure measures 1.16 well below the 3V of a mother battery. so I change the battery and the message did not come out again for 2 or 3 days until it started to come out again. So I decided to do a physical CLEAR CMOS with the jumper and then I thought about doing an update to see if the bios problem was corrected. So the procedure I did was: - Unplug the power source - remove the battery - remove the jumper from pins 1 and 2 (default) and pass them to pins 2 and 3 (clear) - touch the power button for 15 seconds to discharge capacitors. - wait 15 minutes. - return the jummper to pins 1 and 2 (default). - place battery - connect power cable to the source. - Turn on. Well the issue is that turn on turns on but there is no more video. Probe: - with another source = no video - with a pci express video board = no video - place the bios file to load on a pendrive formatted in fat32 (nose if the file has to be loose or the pendrive made bootable with rufus) and nothing. Possible hypotheses: The bios was corrupt and wanting to make a clear cms end up getting corrupted? Possible solutions: That it is not to record the bios back, because I do not have a recorder or I will have to send it to some place that records it back to the bios. I leave some useful links: Video of the steps I did: OFFICIAL ASROCK VIDEO ON YOUTUBE MOTHERBOAR ASROCK 960GM-VGS3 FX MOTHERBOARD ASROCK 960GM-VGS3 FX MANUAL The version of the bios according to the square where the bios is superbly is P1.30 - 1A Thank you in advance for your answers that can help me a little to know what happened and / or what I did wrong in the clear CMOS process.

I tell you that the procedure before everything he did and after changing the battery was to update the bios to correct the failures, but as a colleague says above, you killed her and deleted the same checksum with the mentioned steps, just as I am going to leave an option starting with the previous ones, 1- get a new or second equal plate 2 - try removing the Ram memories The processor, and turning on the Board with nothing for about 1 minute you let rest you put everything again and try if it revives you, do update, from a bootable usb 3 - only if you're curious and want to rehearse the bios on the other motherboard can you do it but under your responsibility