What can prevent hp probook 4520s from starting?

Question

Iron

Hello, comrades, there is a problem of the following nature: a sabzhe laptop has been throwing tricks for 2 days.
It all started with the fact that the video driver started to fly, but the system successfully restored it,
- then cubic artifacts went on the screen in a clean OS.
Further more, by the evening after a couple of video driver restorations, artifacts extinguished the laptop in bsod (wrote something about a memory dump and rebooted).
- after several bsods, the computer calmed down and worked all night without jambs.
- today closer to dinner (from morning to afternoon the system behaved obediently), the computer again went into bsod and booted from 5 times. In mind, there is a hangup at boot, the BIOS did not wake up, the system did not boot.
- it booted up from 5 times and already worked for an hour and again, without a bsod, it just hung with artifacts on the screen for half an hour (after which I had to pull out the battery because it didn’t want to turn off so easily).
After all that, I tried to watch the indicators
- the first eleven attempts to boot were unsuccessful - the caps lock flashes .. then 2 times, then 3 times. (Off site HP writes that this is 1) a problem with the BIOS 2) a problem with the RAM)
Okay, I unwound it, cleaned it, changed the memory ... I start, nothing changes.
I sin on the bios (there was already such a jamb), I make a restoring flash drive with standard xp tools - I boot via win + B + power, it turns on and the hysterical swallowing of air by the fan begins, caps lock flashes without interruption.
I spat, tried other flash drives and other types of BIOS recovery - everything is the same, the computer itself does not boot. The hard drive is working, the cooler is spinning, the caps are off, the power supply indicator is on.
Maybe someone knows what to do? A lot of work .. I would like to return his life on my own! Thank you.

update:
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Booting without bios recovery is generally very passive, the cooler works, but very quietly, the hard drive too, the caps lock indicator does not broadcast problems.
I already think that if you sin on a discrete video adapter (ati mobility radeon), then at least the integrated one should turn on. The documentation says everywhere that this model has 2 videos.
And if you sin on the RAM, then the left bar, at least a little, but should change the situation?

Answer 1

it was necessary to immediately change the driver to WHQL

Answer 2

If the artifacts on the screen - this is a 95% problematic video card. Unfortunately, I don’t remember what exactly the memory or the processor is.

Answer 3

You need a service! Such things happen when chips fall off, when heating / cooling down, the situation can change, such as it expands a little and the contact is good, it cools down and again there is no contact - a critical error, a blue screen, or even a brick state when turned on.
If there is a RAM, and there are several of them, you can remove one, you can stick it in another laptop and run it with memtest.
But it seems to me that it was your chip that fell off