We won't be able to see your screenshot until its cleared (moderated) by the Dell forum team.

However, try clearing CMOS Memory.  With the PC powered off and AC power cable disconnected, press the power button for 30 seconds (drains any remaining power).  Open the case and locate the CR2032 coin cell battery on the motherboard.  Remove the battery for at least 10 minutes then reinstall and try.  Considering this is a used system this would be a good time to replace the battery.  

so you bricked it doing BIOS upgrade, sure locks like that.

click set defaults..

or burn the Firmware using F12 this time, the safe way.

Hello,

first, thanks for answering ..

Second .... why so much nervousness ??????

yes, I know how to change a bios battery, I changed it 1 year ago.

the RTC date was good last time I saw it 1 year ago.

Legacy mode is activated from the beginning.

Model is MT, as I forgot to mention it (I am sorry !)

As you can, now, see the pic, I cannot see bios parameters, that is the problem, le page is blank, just displaying "settings". I don't find why ...

Thanks for your kind help ;o)

Regards

Hello, Thanks for answering...

I tried the jumper manipulation to resert bios  : no success ...

for the image, I thought you could see it, as I see it with another computer/browser ... ?

?

Thanks !

forth why post not telling all things you did to kill it, all steps. (nobody can watch you , see your PC nor know what you or worse below did.)

you let dell run assistant and  they did auto bios update and killed the PC, if yes, you join the club.

you can see the BIOS F2 page is dead.

pull power cord and lit it sit, for 1hr and put back power, is F2 still dead, if yes, see dells pages on BIOS recovery.

my wild guess you made it worse, (flashing for fun gets you THERE)

the F12 forced (PC  out of refurb box)  that means the BIOS Could not find the BOOT drive. !

so turn off PXE in the NIC page F2.

and then set HDD0 or SSD0 as the 1st boot order page (dell sequence)

learn to read all BIOS pages and see that some DEFAULTS are wrong, for sure PXE. (dell says it is business PC and thinks every business runs PXE OS boot servers.  and is wrong. that.

sata ports on,

legacy on. if MBR boot drive.. is it?
TPM OFF.

safe boot off, secure boot off,  and make the HDD0 legacy boot.

https://  clickbait with XSS pe dropper jpeg image.

DO NOT Click on https:// links outside the forum.

You have been warned.

Exif is an abbreviation for “Exchangeable Image File Format”. Technically it is a file format for storing information in media files. The specification uses the JPEG discrete cosine transform (DCT) for compressed image files and TIFF for uncompressed image files. It also uses RIFFWAV for uncompressed audio files and IMA-ADPCM for compressed audio. Note Exif does not support JPEG 2000, PNG or GIF.

Think of it as a way to store metadata inside, say, a picture. When taking a picture with your phone, the phone will store various nifty things in the picture itself. It’ll store the shutter speed, the camera make and model, resolution and what nots. This is Exif data. You can also store information about copyright, a small picture description, the photographers name and much, much more. This is handy and pretty cool – but also quite dangerous. An attacker can also insert malicious code in the Exif tags.

JavaScript code is not being included inside the image file itself per se, it's manifesting within the HTML page that references the image. NON trusted input is being returned inside the image tag for the https:// without sufficient validation or sanitation. This is persistent XSS with the malicious input is being returned every time someone views the page that includes this image (i.e.when they go for the click bait.).