dv7-4051
good clean full model # nice
but no OS stated, we can not GUESS THE OS
NO USB DEVICE STATED , at least say one of them.?
USB is ENDLESS topic, 1000's of devices made from 16 long years.
is it windows XP, the dead now, virus magnet?
it amazes me the vast posts where for windows.
there are 14 version of windows, back to day 1.
hell some even run FREEDOS , heck HP even ships them new like that. (free of MS invasions of privacy this, popular in EU regions.)
lucky you HP still has some support in this LT
some came with windows 7 32bit. in USA.
here is the page on my guess at OS. w7
https://support.hp.com/us-en/drivers/selfservice/hp-pavilion-dv7-4000-entertainment-notebook-pc-series/4149935/model/4230565
see that, see all those DRIVERS>
one is for USB (most times this is the base chips sets)
but if w7 is true, is it, (or higher do this.)
the MS way to fix this is far more easy
if system is not corrupted or infected this works if not F11 restore it.
be connected to the internet first
CP control panel go there.
click device manager, see bad devices(red or yellow marks)
we fix those first. same way.
this magic is called PnP plug and pray.(pun)
plug in any usb device, a keyboard or mouse tops my choice
or usb flash memory stick 2nd
if the keyboard, works on USB< great if not do this.
yes plug in any USB keyboard made or wired mouse to USB jacks
pick one. lets call it USB UNder test, UUT
you then see USB devices in the Device manager. you must
stop uninstalling things, diagnosis is first. not guessing at random.
sorry.
photos RUN CP + DM (path of clicks)
#1
see this, see its not missing see its not red marked or yellow bad.
if its there, plugged in right click those and click update (magic pnp)
ether the usb keyboard or mouse or both.
forget internal LT keyboard.
photo 2
this is really first. this is the USB chip hub inside your PC
all PC have this, and again, must not be missing or red /yellow marked as bad.
see this, same trick, right click them and update it. online
only w7 and newer work now, MS shut down XP and VISTA.
This is DM. window. (mines W10) see my CELL phone there.?
recap:
USB fails for these reasons, (chips USB not blown up)
- OS corrupted ,
- viruses
- loading wrong drivers not from HP or MS to your PC.
- using devices so old W7 does not know about.(obsolete things)
- using new USB devices MS/nor HP supports so go to makers home page and it that there, for example USB headphone MS does not support, next time name something?
eg> examples
my USB flat bed scanner is now dead, due to no more driver support by any one on earth
my head phones all USB fail. unless i get them from the makers.
Best is to try any keyboard /mouse wired, and do that test first
this is called walking before the big run....
do the easy first then we do the hard last.
nothing is more complex than USB support, (expected)
more, printers dead (very old ones)
so next time tell one thing that fails, or all things.
and WIN. by name and maker and model devices.