HP Stream 14 3 long, 2 short blinks

[Smoggy239]

I'd appreciate some advice on a problem with a Stream 14-ax000na laptop. It was working fine until I updated the version of Windows 10 to allow an important update to be installed ( connected an external HDD as insufficient disk space on laptop) laptop continued to work ok,. Also tried to update Bios from a link on a HP Support Assistant notification, this failed "unknown location", also failed a second time  , laptop continued to work ok but failed to boot up the following morning . The only sign of life was the Caps Lock button LED flashing 3 long 2 short blinks. I've read various posts on here and HP support articles and have tried   15 sec power reset followed by power up and Windows key + B ( also Win +V ), pressing Esc or F10 on power up has no effect, I've also created a USB Bios recovery drive following the HP support procedure and that does not work either, the drive has 2 folders - Hewlett Packard and HP, both contain identical files, is this correct as the procedure only mentions a Hewlett Packard folder? I appreciate that the blink pattern indicates a memory problem but I'm suspicious that the attempted Bios update has caused the problem. Thanks

[WAWood]

@Smoggy239 

The HP info on the blink pattern says that if replacing the memory module does not fix the problem, then it is likely the system board -- and replacing that is very costly, even if you can find a replacement.

[Smoggy239]

Thanks for your reply, previous posts regarding this blink pattern have been RAM related, either changing, adding or reseating RAM but I wasn't sure whether it was a corrupted Bios or the RAM itself that was causing the problem in this case, especially given the fact that a Bios update failed "unknown location".  Is there a specific order to the checks that the Bios performs, i.e, a way of determining whether the Bios is functioning at all ?