How do replace the bulb assembly on the sony kdf2A10? need any tools?

You should need only a torx or a philips head screwdriver. Remove the assemply, unscrew the bulb and replace it. You shouldn't have to rewiring. Are you just replacing the assembly because it is broken or is it just the bulb. Let me know and I will get back to you.

Is your bulb still good? You can extend its life by making sure the vent slots on the front and back of the set are cleaned out regularly. Vents plugged with dust will not allow adequate cooling airflow over the bulb.

On-line bulb prices range from $30 for cheap Chinese generic bare bulb replacements (quality unknown) to $150 or more for brand-name lamps already assembled into a housing. If you go with the bare bulb, you need to be able to assemble the bulb into the housing (tools required) while wearing vinyl gloves. Touching a bare bulb with bare fingers will ruin the bulb. Skin oil will react with the quartz when it gets hot and cause discoloration and possibly chemical breakdown leading to a bulb explosion.

Yes,it is repairable.Blue dots on screen is sign of LCD failure at optical block assembly. There are three LCD on the optical assembly RED,GREEN and BLUE. Blue LCD failure causes blue dots on screen. Repair should be done by replacing blue LCD. Note! LCD replacement needs Extra care and precise tools such as oscilloscope and color pattern generator , for the color alignment after replacing LCD. But if you can afford, replacing the optical block is better,

Try connecting the TV directly to a different wall outlet and check. If the issue persists, try power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue persists, then the TV requires service

open the trunk lid and remove the screws. If they are star head screws, you'll need that typ of tool. The assmbly should easily be removed and you'll have access to the bulbs

Most of this solution for changing a headlamp on a ford focus sedan is taken from solution 2's writeup, accept with a few more details that should help changing the bulb assembly for the novice. Pop the hood. At the front of the car, look to the back of the headlight assembly. There will be a plastic cover on the back. On some models, you need to unscrew the plastic cap; on others, it just pops or screws off. Remove the plastic cover and then take note of the orientation of the three prong connector on the back of the bulb assembly. This is important because the replacement bulb assembly is going to have to be positioned in the same manner. By noting the orientation before taking out the old assembly, it will be easier to orient the replacement bulb assembly after removal.
There is a small retaining clip that surrounds and holds the bulb in place. Removing the clip can be tricky. On my 2003 Ford Focus sedan, there is a special place to push and release the clip that is above the bulb - perhaps further above than you might think. Push the release clip and it will release the retaining clip from the bulb assembly. Gently pull the retaining clip down and out of the way of the bulb assembly. Pull the original bulb straight out. Remove the three prong connector from the bulb assembly. Connect the three prong connector to the replacement bulb and then orient the three prong connector as the original and push bulb assembly straight back into place. Jiggle the assembly slightly to seat it into the correct position in the headlamp housing and replace the retaining clip to hold the bulb in place. Replace the plastic cover on the back of the headlamp and replacement is complete.
No tools. 10 minutes.

Your "light engine has possibly gone down on you, did you replace just the bulb it's self or the complete bulb assembly? If you pulled out light assembly and replace just the bulb then repalce light assembly, if you repalced the whole light socket assembly and still have greenish color the you have a "light engine problem". Seek repair tech.

OPEN THE LIFT GATE TAKE OUT THE TWO SCREWS ON THE SIDE OF THE TAIL LIGHT LENSE THEN PULL ON THE TAIL LENSE TO RELEASE IT FROM THE SELF LOCKING FASTENERS YOU CAN'T SEE, REPLACE ALL THE BULBS AND REVERSE POROCEDURE.

Headlight Bulb Removal & Installation To Remove:

1. Disconnect and isolate the negative battery cable.
2. Remove the headlight assembly mounting screws.
3. Pull the assembly forward and disconnect the bulb connector.
4. Turn the bulb retainer ring counterclockwise and remove the bulb from the headlight assembly.

To Install:
NOTE: Do not handle the glass portion of the bulb with your bare fingers.

1. Install the bulb in the headlight assembly.
2. Install the retainer ring.
3. Connect the connector to the bulb.
4. Install the headlight assembly in the vehicle.
5. Connect the negative battery cable.

No special tools required.

Click here to find the lamp for your TV. You will still need to use the existing cage assembly, once you remove the old lamp you will be able to see how it's assemble.
For the lamp replacement instructions, you will need to download the owner's manual and go to page 16 to 22 to know how is done.

Good Luck.