Solved how to repair/reinstall windows 7 blindly

May 25, 2014 at 11:52:54
Specs: Windows 7, 16GB
laptop screen does not work and external monitor does not see bios or pre logon screens.
external monitor shows a blacks screen with cursor.
windows key + P shows me a choice of monitor options to choose but none show anything other than blackscreen with movable cursor.

trying to boot into safe mode or any other mode is not possible as cannot see anything.
if I could then maybe I could apply one of the fixes found by googling.

I tried making an unattended setup dvd with a new hd but no go.

There is a recovery partition on the hd but until I can see boot options...............

Any ideas?
Can a repair disc be made that needs no input?
Can I load a hd with windows that will boot straight to desktop once inserted into laptop?
I don't even know if bios/boot has the option to boot from dvd enabled?

message edited by indigian


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✔ Best Answer
May 28, 2014 at 16:13:52
Lets see, motherboard, possibly display, if 4 years old, probably fan and battery.... Unless it is an exceptional laptop or you just like to putter with it, it would be better overall to just replace it with an up to date new one. If the budget it tight, consider a factory refurbished model as long as it comes with decent warranty and reasonably modern specs. New would be my choice here if 4 years old or close to it.

You have to be a little bit crazy to keep you from going insane.



#1
May 25, 2014 at 19:50:04
So the laptop screen shows nothing and the external monitor just shows the blinking cursor?

The 'windows key + p' is a windows 7 function and not the bios so it must be booting to 7 OK. Here's some info on that:

http://support.microsoft.com/kb/229...

Unless you know differently I don't think there's a problem with your windows installation; it's with your screen and/or monitor selection. A reinstall isn't going to change that. I really think you should look into fixing the obvious problem with the display first. But if you insist here's some info on an unattended windows 7 install:

http://www.intowindows.com/how-to-c...

But first you might see if you can get to the recovery partition. The steps to do so are likely spelled out in the laptop manual and you may be able to do it even if the monitor is blank.


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#2
May 26, 2014 at 09:27:48
the windows install is actually trashed so new install is required.

I've put the hd into a different laptop and the restore to factory option comes up so trying that for now.

I think it's a limitation of the vga output that it won't display bios screens etc

I'll try the unattended again now I've found graphic drivers if this way does not work....
having trouble getting into the lappy to check the screen :(


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#3
May 26, 2014 at 14:11:40
Presumably you are aware that anything akin to reset/restore to factory status, or an actual re-install, will lose/delete all your personal files etc...? So (again) presumably you will have taken steps to copy those files to external storage?

Even if you can't actually boot to the drive as is, you can always access it via another working system; usb adapter approach is one way? You can then locate and copy files etc.

Then set about sorting out your current problem?

Have you checked to see if the laptop vga isn't set to o/p to an external monitor/display only; rather than to the built-in display itself? Usually this is via the F key + another suitably marked key to select which option... I'm not sure if by default it remembers what it is was last time it booted up; or if it resets to internal display at boot up, or remains on the external if that was used last...?


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#4
May 26, 2014 at 14:48:44
I think it's a limitation of the vga output that it won't display BIOS screens etc

What limitations might they be then. If you stop and think about the logic of that statement for while you will realize how wrong it is. Until such time as windows is up and running, VGA is all you have and that is VGA in text mode which is about as simple as you can get.

VGA text mode is a standard that has existed since the 1980s and all BIOS, graphics hardware and PC monitors are designed to use it because the drivers are simple, standard and built into the BIOS.

If you cannot display the BIOS screen on an external monitor is is because of some configuration of the laptop that is preventing it. Trvlr is on the right lines and there is almost certainly a key combination that will activate the external monitor.

Until such time as you can see something on the monitor, attempting to install windows is going to be a futile exercise.

Stuart


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#5
May 27, 2014 at 10:00:46
Reading between the OP's lines, I have decided on the following facts. Anyone confirm/deny?

1) Laptop's display is dead.
2) Laptop's BIOS doesn't mirror output to external display; presumably assumes the laptop display will always be available.
3) Windows video drivers are configured to use external display, allowing normal operation once Windows is booted.
4) OP wants to reinstall Windows for reasons undefined; possibly believes the hardware failure is caused by Windows.

How To Ask Questions The Smart Way


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#6
May 27, 2014 at 12:24:48
Hi all,thanks for the inputs.

Yes,laptop screen is dead or at least seems that way.
external monitor does not see boot screens.
windows install was a mess and was going to be reinstalled anyway.

googling the problem...................

bios to external screen may be a bios tweak?
I did read somewhere that maybe this hp laptop has had vga output socket 'limited' to some degree by hp themselves?
external monitor only displays once laptop graphics drivers are installed.
tried the key combo's but nothing switches to external monitor
key combo works once booted though.

I have managed to restore to factory default by inserting hd into a different laptop and running hp repair program.
switched hd back into lappy once initial install finished which then ran the 1st install.

lappy was shutting down every 30 mins (and still does) with fan going on full chat from boot up.
it is not overheating,temps for both cores 40 or less,arrandale pentium.
fan was running normal during install process.

I won't swear to it as maybe it was a trick of the light but the screen maybe faintly 'glowed' when booting up,no visuals but maybe the backlight or something?
or I could have imagined that,will check when it's dark.

message edited by indigian


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#7
May 27, 2014 at 13:25:04
Sounds like the back light failed. Test by using a really bright flashlight. you might be able to make out the screen. This might be enough to get into the BIOS and have it prefer the external display. If it is the back light, it's probably the inverter. They run sub-$30, so see how much your local laptop repair shop will charge you for the 1-2 hour repair job.

It also sounds like your laptop has suffered overheat damage. On HP laptops, I have seen the heat sinks pull off of various bits it should be cooling. HPs also have issues with the solder cracking during overheats. This results in shorts / disconnect issues as things warm up. Test for this is to use a fan to blow cool air over the laptop base. It probably won't prevent the shutdowns, but it should extend it out to 35 minutes.

How To Ask Questions The Smart Way


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#8
May 28, 2014 at 08:53:28
just booted it up after being at work all day and fan was normal,it has kicked in to full chat after about 5 mins or so.
heat never ramped up to cause the fan to come on full....

temp is around 30c core0 and 20c core1 at idle
these temps seem fine and base of lappy never feels hot.


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#9
May 28, 2014 at 09:03:30
It's liable to be the GPU. Possibly the PCH.

How To Ask Questions The Smart Way


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#10
May 28, 2014 at 09:42:38
GPU might be first port of call - as it's graphic/display related?

But is it easily replaced by the average owner - let alone a "reasonably competent" technical type?


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#11
May 28, 2014 at 10:21:23
Sure. Toss the old laptop, and get a new one with a fresh GPU.

GPUs are typically soldered on to the MB. Especially on cheaper, racing to the bottom laptops you see in consumer models. To replace it would require a solder reflow station, either professional or homebrew, and a chip you probably can't get by itself.

In laptop repair, reflow the solder to see if that solved the issue. If not, suggest a new MB, which includes the GPU. While you're in there, verify the heatsinks are clean and still attached. Verify the fans are clean and spinning freely. Consider replacing them if approaching 4 years-old.

How To Ask Questions The Smart Way


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#12
May 28, 2014 at 12:20:39
Hi Razor... My "comment" was rheotorical in that I was implying that it's not within the scope of the average user; unless she/he is well experienced with fine component soldering...

And likley there may be other issues to deal with too...

I would agree to change the whole motherboard...


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#13
May 28, 2014 at 16:13:52
✔ Best Answer
Lets see, motherboard, possibly display, if 4 years old, probably fan and battery.... Unless it is an exceptional laptop or you just like to putter with it, it would be better overall to just replace it with an up to date new one. If the budget it tight, consider a factory refurbished model as long as it comes with decent warranty and reasonably modern specs. New would be my choice here if 4 years old or close to it.

You have to be a little bit crazy to keep you from going insane.


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#14
May 29, 2014 at 04:25:17
Thanks to one and all.
Will just put up until funds are there for new lappy

Thanks


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