Would those be the transistors on the chase light board itself?

On the Solenoid/Flasher table, look for 5th column, called Backbox connections -> J105, J118. Now, go for Solenoid Wiring, at page 3-9 in the manual.
On Power Driver check
J105, pins 4-5
J118, pins 2-3

...and look for required voltages.

WH2O chase (resized).JPG

At 1st step, makes sense to check voltage levels.
As 2nd step, check the traces at bottom side, from J123 pin 4-5 to the sub-circuit around Q20 and Q22.

20190603_220745 (resized).jpg

http://pinwiki.com/wiki/index.php?title=Williams_WPC#WPC-89_Power.2FDriver_Board

The topper lights went out on mine. I had my tech (who’s a career electrician) buddy go through the entire driver board and he replaced two of the capacitors. Everything back to working perfect.

My recommendation is to not sweat it until you get your 5V issue fixed. I am thinking that will fix your issue.

my topper lights went out after only turning it on 5 times after a technician came out and fixed it (350.00)... so, not doing THAT again. how would a non-electrician, non-technician go about fixing these topper lights w/o calling a tech again?

Firstly check you have the correct bulbs in there.

A lot of people make the mistake of putting regular 555 pinball bulbs or LEDs in the sockets.

The bulbs are supposed to be 12v 194 bulbs.

See what you have in there.

rd

so, the bulbs are right, they worked for a year no problem, ANOTHER technician had me buy a new topper light board from marco (103.75), and only 1 of the 2 led lights on the board light up. as far as all the main backboard boards, they were all just re-done by Eugene in MN. "bulletproofed". so, after 3 different technicians, re-worked boards, a new plug, and a new chaser light board, the lights still arent working. it's definetly a power issue, either the driver boards or capacitors or a fuse. thing is, I've had 2 techs come out already (700.00) and its still not working. I was hoping to get some help from this forum, im at my wits end with this. as you can see, the red led on the right isnt lighting up (no power), and thats the new plug right beside it. brand new board too. so it has to be the power driver or capacitors thats feeding the power to that cord/plug... previously that plug was burnt to a crisp, so there has to be a power problem that the techs dont want to mess with.

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IMG_4128 (resized).jpeg

Fuse F111 on the powerdriver ok ?
J104/J105 with the WHT-RED wires connected ?