Burners wont light can be lit with a match. gravy boiled over in burners.

That is a probe that one attaches a lit paper match too(see circle) so you can light the piolet light w/o getting burned.

Before you go to match lighting, have you changed the battery in the ignitor button? If you haven't, I'd start there first. Unscrew the ignitor cap and the battery's Positive Tip (+) will be facing you. Be sure to install the new battery in the same direction.While the battery is out, check for any corrosion that may be present in the battery holder. A Q-Tip & WD40 work well to clean out any corrosion.

To match light the burners ... use a long stick match (also called a hearth match) and carefully guide the match between the grates and under the flame tamers, as close to each burner as possible. Of course, the match should be lit prior to doing this. Turn each burner on individually, as you place the lighted match next to it. Once the burner lights, turn it down to low and move to the next burner and so on, until all the burners you want to use are lit. Then set the flame heights where you want them.

Hope this helped you. Please let me know and Happy Grilling!!

YES, YOU CAN DO A MATCH.
BEFORE YOU LIGHT IT WITH A MATCH, REMOVE THE TOP GRILL TO
EXPOSE THE BURNER BELOW IT.
THIS WAY THE MATCH WHEN LIT AND THROWN IN WILL NOT GET STUCK IN THE
GRILL AREA WHILE THE GAS IS ON. THEN MORE GAS WILL BE IN THERE
BEFORE YOU GET ANOTHER MATCH LIT TO THROW IN. NEXT THING
YOU KNOW, THE MATCH DROPS DOWN IN BETWEEN THE GRILL AND
FINALLY MAKES THE BURNER AREA AND GOES 'BOOM'!
REMOVING THE TOP GRILL MAKES IT EASY TO TOSS THE MATCH
DOWN BY THE BURNER AFTER A FEW SECONDS WITHOUT A 'BOOM'.
TO FIX YOUR ELECTRONIC START BUTTON ON MOST UNITS, RE-POSITION
THE ARC UNIT IN THE BURNER AREA, TO BE CLOSER TO THE METAL IT ARCS TO.
IT IS MOST LIKELY VIBRATED AWAY FROM IT TO FAR AND THE ARC WILL NOT REACH
METAL OR GROUND TO MAKE AN ARC TO LIGHT THE GAS.

The igniter usually sparks for all burners on the stove at the same time. Usually a little water or gravy, or such has gotten on the little spike that stick up and throws the spark to the burner. If you will take a small brush, like a tooth brush and carefully clean around the little spike it normally starts sparking again. As it is right now, you should be able to see the spark on all the burners whenever you start any of the burners. Check to see on the one that is not lighting, I think you will find that it is not sparking at all right now.

Most gas range tops no longer have pilot lights but use an electronic ignition (sparker) to light the burner. Normally when you turn the burner on you should here a snapping or sparking sound, at which point the burner should ignite. Here is a link to the user manual for 36" - 5 burner Thermador rangetop...maybe this will help: http://dl.owneriq.net/a/ac64ae7b-1ed3-44a3-9235-e4dbd8fe4628.pdf

By the way, in the short term you could always use a match to light the burner. JUST BE VERY CAREFUL THE YOU HAVE THE MATCH LIT AND OVER THE DESIRED BURNER BEFORE YOU TURN KNOB TO START THE BURNER!!!!

replace the ignition coil if no sound clicking,but the parts is expensive? is ok to use macht.

Make certain the burner and burner base are very clean by carefully washing in warm soapy water, using a plastic brush to scrub any residue off the surfaces. Also clean the spark ignition nub in this same way.

I am hesitant about answering your question because if the flame is adjusted incorrectly it could be dangerous.
Remove the knob and look inside the stem of the gas valve. You will see a very small adjustment screw. This is where you adjust the flame for the burner.
What I usually do is light the burner and turn it to the lowest setting. Hold the stem in this position and turn the screw. They are usuall kind of stiff to turn.
You want to adjust the flame so that it just comes to the top of the burner cap at the low setting.
This is the important part!!!
When you have got the flame adjusted, put the knob on and turn the flame to high. Quickly turn it from high to low, if the flame goes out, adjust it higher. Repeat this test until you can turn it from high to low quickly and it stay lit.
Also important to remember. When turning the screw, a little turn goes a long way.
Post back if you have any questions.

Not sure, but sounds like you may have a gas pressure problem or the stove is set-up for the wrong type of gas.

lhs burner - problem is probably thermo-couple. this is a safety device which prevents gas escape if flame blows out. rhs burner - you do not say if it can be lit by a match. if so then it is a problem with the electrode or the wire to it chaffed thro. if can't be lit by a match, then a problem with the gas valve which is unusual not a diy fix unless you are experienced