I just finished replacing the four backlight tubes for my HP2509m. The disassembly was easy and you don't need to take the entire LCD assembly apart because the backlight assemblies slide out. Just open the top metal frame enough to expose the ends of the backlights so you can slide them out.
After I slid out the bottom backlight assembly I had the same burned off white wire described in other posts - I cut off about 4 inches of that wire and replaced it. I could have just repaired that but as long as I had the display apart I went ahead and replaced all four bulbs with ones I had ordered from CCFL warehouse. The display is very bright and I had to turn the brightness down to 70 and may need to turn it down further as I am in daylight right now.
So before you suspect the inverter, check both backlight assemblies for this burnt wire issue, especially the lower one if you hear the sparking or arcing.
A couple of tips: order some rubber "figure 8" spacers - I'm glad that I did as I broke a few of the originals sliding them off the tubes. You may also want to order eight of those silcone rubber boots for the ends of the tubes. I did not and had to slice open the original ones. I re-sealed them with aquarium sealant.
This is not an easy undertaking and it took me several hours to finish including the curing time for the sealant. So if you are not "experienced" with soldering and electronic assembly, you might want to have CCFL warehouse rebuild the backlights for you.
Now that I am over the learning curve I can keep an eye out for more of these monitors being trashed or on the cheap.
Here is what I ordered:
Name Code Qty Each Options
-----------------------------------------------------------------------------
Standard Monitor Repair SMRK1 1 29.99 Manufacturer
Kit = HP
Model
# = 2509m
Screen
Size Diagonal = 25"
Screen
Size Horizontal = 21 3/4"
FIGURE 8's FIG8 8 0.25
Subtotal 31.99
Shipping 4.99
Tax 0.00
Total 36.98
Bill
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