Help with intermittent fault on a CXB3590 panel

Vonkins said:

Im running 4 cxb3590s with an hlg 240h1750b. I have 5 bars qith these 4 cobs on each. One bar went out completely. Probably a bad cob cause im getting 142.5 volts at my light bar.

Click to expand...

Hmm!
Check the COB's first, is something visible? Brown spots in the yellow phosphor layer? If not, I don't think there is a defect. Then check all the connections and make sure the tiny "copper legs" of the shitty Ideal holders have good contact to the COB's solder joints. That's often a problem with Ideal holders.
Especially when tightened too strong they tend to bent over time and loose contact.
Pretty sure you can get it back running!

Randomblame said:

Hmm!
Check the COB's first, is something visible? Brown spots in the yellow phosphor layer? If not, I don't think there is a defect. Then check all the connections and make sure the tiny "copper legs" of the shitty Ideal holders have good contact to the COB's solder joints. That's often a problem with Ideal holders.
Especially when tightened too strong they tend to bent over time and loose contact.
Pretty sure you can get it back running!

Click to expand...

Personally, I would dispense with holders entirely and solder the wires onto the pads.

nfhiggs said:

Personally, I would dispense with holders entirely and solder the wires onto the pads.

Click to expand...

I really suck at soldering

nfhiggs said:

Personally, I would dispense with holders entirely and solder the wires onto the pads.

Click to expand...

Yeah! That's what I do too. They cause too much issues or I'm a totally dumbass, lol!
Either they bent because they are made of metal sheet or they broke because of brittle and dried out plastics..
When the COB's have no screw holes I'm wearing up a thin layer of Arctic Silver and leave two of the corners free, on these corners I use cheap 1 $ thermal glue. So I can easily remove the COB's again if necessary using a thin guitar string. Works great.

Vonkins said:

I really suck at soldering

Click to expand...

Lol!
Take some old wire and try it previously on an old radio or something else. It's not that hard and after an hour or two you get a feel for it. Take a solder with added flux(to keep it simple), put some solder on both places, which you want to solder (usually wire tip and solder pad) then put both on top of each other and let more solder flow between them. Wait a second or two and voilá, it keeps!

Heat the work not the solder (small solder bridge is your friend, tin your tip) bring solder into heated work, flow baby flow.

Vonkins said:

I really suck at soldering

Click to expand...

90% of good solder results is knowing what products and tools to use. You always want to use Sn 63/37 rosin core solder and a good adjustable heat soldering iron.