It's an A13 based tablet but with no HDMI output.

After he dropped it the video was still plying as one could still hear the audio but the screen went all white.
The device still turns on and off with the power button.

I opened it up hoping to find the flect cable out of place but the problem lies elsewhere.

Anyone have any idea on fixing it without spending more then the tab itself is worth ?

probably the best way of fixing it would be to re-install its OS. On instructions how to do it, please refer to your tablets' manufacturer's website (or you can look through internet tech forums)......

State in which device is turning on/off simultanously is called bootloop and is first indication of system failure. In 99% cases reinstaling OS repairs it.

Seriously??? Did you even read/understand the OP's question?

THE SCREEN IS PHYSICALLY BROKEN...how, exactly, is reinstalling the OS going to fix it? And did you look at the device? It's an Android tablet...how do you re-install Android ROM's? The device isn't in a boot-loop...the OP VERY CLEARLY said the device turns on and off with the power switch...like it SHOULD. They need a new screen.

OP, aside from finding a replacement screen somewhere (the manufacturer may be able to give you some hints/help from their support forum), there's probably not much you can do.

The device still turns on and off with the power button.
magic word written in bold..... still so I assume that, after turning it on with power switch, it turns on and off repeatadly, am I correct, author?

As its Android device, OS can be reinstalled via Recovery (and/or download mode). These are special modes designed to make system-actions (reinstalling/changing/fixing) simple (via GUI in most cases). You ussualy enter these modes by holding Vol+ (sometimes Vol-) + power/home button. It varies from device to device. Thats why I wrote that author should refer to manufacturers webpage....

Right...the OP said it still turns off and on with the power button. Never said it did it repeatedly, or 'looped', just that it turned off/on as it should.
Yes, you MIGHT be able to flash it, but again:

HOW WOULD REINSTALLING THE OS FIX A BROKEN SCREEN??? The HARDWARE is broken...the OP even says it's all-white, and won't display anything.

hey hey hey . Slow down a little :

When display goes white and freezes after (or during) booting it is sign that something is not ok.... maybe connector maybe sth else I did not see device so I am unable to tell..... broken (100 % not working, or broken physically) will not react at all either to power btn or to sth else......

if sth is still happening it means its happening repeatedly, right? Author did not have to say that as its obvious......

You don't have to see it; you have to be able to read. The OP VERY CLEARLY SAID that after it was dropped, the screen turned solid white...AND WAS STILL PLAYING A VIDEO; audio worked, and it turned on/off with power button just fine. It didn't freeze during boot, or after...it was WORKING, and kept ON WORKING. The OP also clearly said they opened it up and CHECKED the connector. You seem to have ignored ALL of that.
The only thing that's happening is that the OP's screen is solid white, after being dropped and broken. The OP said it turns on/off just fine, but they SCREEN doesn't work.

Again, reloading an OS on a broken device will not magically fix a broken piece of hardware.

I am not familiar at all with tablets but I have repaired latops wih brokens screens I just checked around on ebay and places likethat for parts but it might be cheaper to somehow remotebackup everything and buy a new tablet

@TBOne: the video meaning Video Card or GPU for short.... not video file.....
same with sound - sound effects like touching the screen, (system) events bell, etc.

No idea what you're going on about. And you're still not getting the point.

The OP has VERY CLEARLY said that the device is working EXCEPT THE SCREEN after being dropped. They also said that they opened it and checked for loose connections and didn't find any. And your advice was to tell them to reload Android, to fix the broken screen? It was dropped and broken, period. Reloading Android won't fix it.

Yeah the device has been physically damaged but I've been unable to identify exactly where the damage is.
By still being able to turn on and off the device I mean that I can turn it on, the screen goes white and I can head the welcome sound ... I can then turn it off by pressing and holding down the power button until the device turns off (if I could guess where the ok area is on the broken screen I guess I could also shut it down properly).

I was looking for some advice like: check out a certain component or
check tension (or even connect a 20khz software oscilloscope) on certain points to figure out where the fault is.

The OS on the device still works fine so I don't need to reinstall it nor will it help fix the problem as it has some unidentified physical damage.

Agreed; reloading the OS is pointless (as you said), and the device is WORKING...you just can't SEE it. It could be either the screen itself (likely), or the controller (not as likely, since you have a solid white screen).

As Shadowmeph pointed out, your best bet for a cheap solution would be eBay or other such sites for a used screen or cheap replacement. Since you've already opened the device up, see if you can get any manufacturer info/model numbers from the screen itself. You may be able to buy it from several sources, if you want to go that route.

1 members found this post helpful.

The screen is called a digitizer. Look on ebay in your area for a replacement.
For phones they are pretty cheap. 10 bucks or under.
I expect the same goes for tablets.

When it was new it was 59 euro (about 70$) I would not pay anything more then 30Euro to fix it it's just not worth it. Not sure if I can get a replacement screen for that price (supposing it is the screen itself).
I had a look at how the lcd is stick into the top side of the casing and I'm pretty much sure I can't take them apart without braking the casing.

I could test it with my tab's screen (I've an identical unit) but I'm a little skeptical on doing that as I believe it's not a good thing to take apart what needs not repair.

I suppose I can make it into a low power hedless server.

If you can't find screws or other such things holding it together, chances are it was done by adhesive. You could warm it up (hair dryer), and see if you can make headway...start at the corners. Not my first time voiding a warranty.
Honestly, if it was $70, I'd not bother. A new screen will probably be about 30-ish...and all you'll have after you're done is an OLD working tablet that you've now paid more than $100 for.