I have disassembled the entire laptop, changed the bios battery, as it was at 2.95 volts, and I have closed it again, at first everything went wrong, just like before, but after several attempts I restarted the computer and everything went well.

LITTLE BY LITTLE YOU ARE RESOLVING MY DIAGNOSTIC PROBLEMS AND GIVING ME IDEAS, thank you very much to all of you.

the only thing left for me to do is to put the sound and I don't know if I should open another specific topic for this, as it seems more serious than it is. What do I do?

As I said this computer is for windows vista, and now I have windows 7, I have tried downloading the sound drivers from the official realtek page, but it doesn't work, not even the video multimedia devices, games etc.. appear in the device list.

Anyway, summary:

DVD.. solved (reinstallation of the operating system)
Graphics.. solved (cable placed incorrectly, or bad contact with the pins + change of bios battery)
sound … (error 10), still in diagnosis, but with help everything will surely go well.

Greetings and thanks to all of you for your comments.

It could also be a problem with the motherboard or the screen, but that's harder to diagnose without the PC in front of you. The graphics card looks like it's working fine.

It's a physical problem with the computer and can't be fixed with software.

My doubt is whether I can use the VGA port to see the operating system, because the screen looks red to me, is it the cable's fault?? or the motherboard's? I have already ruled out the drivers, so there must be some problem with the image processing.

This would be solved if I had at least another screen and could definitively rule out the screen.
But I don't understand why it's seen through the VGA and not through the original laptop's screen.

As soon as I plug in the computer, a white screen appears and gradually blurs to black, the screen has not been damaged, so I think it's the motherboard.

If anyone has had a similar experience or solved this conflict, I would appreciate it.

edit: from the VGA port to an external screen everything looks perfect to me, but from the laptop's screen it's not visible.

I updated Windows 7, it took the drive and from the bios with the cd boot I installed Vista.
To be honest I don't know why this happened, it's curious, the laptop's dvd drive should appear if or so with the generic drivers, I think.

As for the graphics, well it was obvious, now that I think about it, if from the moment Windows starts up the screen turns red, that is from the beginning of the bios, then it's the graphics.

I'm going to try to open the laptop to take a look inside, according to what I've read in videos of replacing the graphics in laptops the graphics usually fail due to poor soldering due to the heating of the components and the pins of the chip are unsoldered

download a Windows Vista ISO and use wintoflash to make a bootable USB. But sometimes I get desperate because I don't understand why the USB isn't working.

Anyway, now that I've figured it out, I'm going to try a CD that I have for booting through a menu between DVD, USB and disc, this installs the drivers to see if it picks up the adapter and I can finally install Windows Vista once and for all :wall:

edit: if the laptop's DVD doesn't work what a joke. The CD won't work.

Best regards and thanks for your patience.

Also try a clean install: format before installing.

And besides, I can't see the laptop's dvd drive, or when I see it, it disappears.
I suppose I will have to make a bootable usb of windows vista and install
or reinstall windows 7 just in case.

Right now I am installing from a usb-dvd a windows 7 to see if it was the windows 7 that was corrupt. I will comment on it.

Even so it is strange because it does not let me install from the usb-dvd adapter the windows vista system

The question is that I have about 100 gb free on the hard drive, I don't see the dvd drive, and the screen is bad.

This is very strange, that's why I am seeing if I can switch from windows 7 to windows vista in an effective or good way.

Buenas:

Tengo un portatil el cual tiene instalado windows 7 es un hp pavilion dv9738es, mire en las especificaciones de la web oficial de hp y dice que los controladores solo son para windows vista.

La Grafica esta como rota, sera cosa de los controladores graficos, el color negro se me ve como rojizo, osea que el problema esta en windows 7 ya que este equipo no soporta dicho sistema y esta preparado para windows vista.

Alguien sabe como pasar de windows 7 a vista sin tener que formatear el pc y sin perder los programas ya instalados??

necesitaria un tutorial. Gracias.

Eso que dices no tiene ni pies ni cabeza.

Según veo en las especificaciones, tiene una gráfica nVidia. Vete al sitio de nVidia y bájate de ahí los controladores para Windows 7. Y haz lo mismo con los controladores de todos los dispositivos: vete a su sitio oficial y te bajas de ahí los controladores.

De todas formas si es un portátil de la era Windows Vista, dudo mucho que tengas que instalar controladores con Windows 7: la mayoría de los dispositivos estarán incluidos en la base de datos de controladores de Windows.

Si la pantalla muestra cosas raras no es por Windows 7 sino por un fallo en el hardware, algún malware o una configuración errónea.