HP ZD7000 laptop screen won't work.

Did you try connecting it to an external monitor? Then try software updates and see if you can roll back the driver for the monitor or the computer to when it worked right.

no laptop stated ok W7 OS, nice to know.
hopeless?
nor external model screen stated
try a different external screen

any shop can fix it, ask them
no need to ship anything
get it checked out by a technician
we can test all 3 parts and tell you whats worn i minutes.
i can not understand your post
try to be more clear
does local LT screen work ok
does using a known directly connected screen (VGA)
on the LT you must turn on external screen using the fn hot key
the the external works,. do so, now
if both internal and external fail the LT is bad, guess, bad GPU chip
if only external fails, try a known working external screen
if that works your external is bad.
the docking is last, and if only it fails, then ITS BAD.

If you have an external monitor or LCD monitor, try connecting it to the laptop and then turn the laptop on - if external video shows up normally then most likely you have a bad screen; if both internal and external video shows pretty much the same white lines / white outs then the system (systemboard) is most likely bad.

We can further isolate the issue by connecting an external monitor to the notebook. If the display is fine with the external monitor, this clearly indicates that the issue is related to the LCD screen. Otherwise, it is due to the some other internal hardware.

You may follow these steps to connect the notebook to an external monitor.

1. Turn Off Computer.
2. Connect the monitor cable from the monitor to the monitor port on
the rear of the computer.
3. Connect the monitor to a power source and turn it on.
4. Press the Power button to turn on the computer.

* Switching the display to the external monitor

Press FN + F4 to toggle the display between the Notebook display and
External monitor.

I just built/repaired one of these the other day. My son uses it now. Motherboards are notorious for going out. However you need to give more description to your problem. You just say it has issues but that doesnt really tell me anything. If you turn it on and get no beeps and no screen and everything seems dead except for the power light then it needs the system board replaced. But if you see the hard drive light running like normal with nothing on the screen then try it with an external monitor. If the external monitor works then the screen has died but the motherboard video card components are good. If you still got nothing then the board is bad and will need replaced.
I'm sorry it is almost always bad news on these.

Did you try the FN+screen switch key. maybe check to see if nothing is loose ( hdd, ram ) also the bios to see if screen settings are correct

Check the Leds on laptop. Try to turn on the laptop with just the a/c adapter. Disconnect battery,a/c adapter and drain flea power by holding power button for 15 second. Connect /ac adapter and check. Disconnect harddrive and memory from laptop.Reconnect and try to reboot.Possible issue with motherboard.

The graphics chip needs resoldering (reflow). Got the same laptop in for repair yesterday. At first when power cord plugged in all LEDS stay, hard drive spins but fans don't work and nothing on screen. A bit later everything's dead. I've seen too many HPs with poor soldering issues. can't really say they're making good laptops these years.

You still might have a problem with your connector. It might have a cold soldered joints. Try to power on your laptop with no keyboard cover in the way were you can have an access to the place where cable is connected to your motherboard then try to wiggle it a little. If your video is coming up and down, you have a cold soldered joints. Another considerations would be:
1. Your LCD cable
2. Your LCD goes bad

Regards.

Hello tonyphats,

How are you trying to use the monitor? Just connecting it to the laptop? I know on most laptops you have to select to use the external monitor it won't just come up. You usually have to hold down the 'Fn' button and then press 'F5' or 'F7' to toggle between - monitor only, monitor and lcd, and lcd only.

If you are trying that, what happens? Does anything show on the screen?

-Chester