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/diy/ - Do It Yourself

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2444714 No.2444714 [Reply] [Original]

How do I go about fixing a board like this? When powered, it doesn't light up until the room it's in is above say 75F, and then it's only half of the board. When it is 80F+ ish, the whole thing lights up. Wat do?

>> No.2444715
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2444715

Picca

>> No.2444717
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2444717

More picca

>> No.2444719
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2444719

More

>> No.2445784

>>2444714
check connections

>> No.2445882

>>2445784
Just the wire connections? Should I be checking the boards as well? Would a fuse tester work to see if it's getting power?

>> No.2445894

>>2444714
>chink shit
>thermal expansion
>bad solder joint sumwhar

>> No.2446412

>>2444714
Perhaps take a hair dryer and gently warm parts of the board to narrow down a problem area. This includes the power supply.

Here's something to try if you have no volt meter or multimeter.

Firstly, are those printed number or are those two dots adjacent to the LEDs pads with continuity to the LEDs?

If they are pads and not printing on the board, use a wire jumper or a metal tool to short each of the LEDs one by one. If one LED has an open condition the other LEDS will light when the bad one is shorted. It might reveal an LED with a poor solder joint or an internal failure. This assumes the power supply is working.

An alternate way would be to check the same points with a volt meter. An open LED would show full supply voltage and the other LEDs would be zero.

>> No.2447567
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2447567

>>2445894
this.
Check all solder joints to see if one is broken. The aluminium baseplate expands enough to make the connection when heated to 80F+.

>> No.2447905
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2447905

>>2447567
>>2446412
Okay. V informative. V helpful. Thanks a lot. So, I'll resolder the wires one by one until it seems to want to work again.