Hello, I hope everyone is good.

I got an issue with a desktop led light that I would like to fix, so my wife came and inject my laptop charger with 18V and now the unit is not turning on at all.
I tested the Led and it's working fine, this led has a touch sensor whenever you touch it, it has 3 levels of lighting, Bright lighting, Medium and Low then when you touch it it will turn off.

I'm not sure which part is burned, it has a rechargeable battery which I tested and it's working fine.

I have attached images so you can have a better idea.

 

Welcome to AAC!

Can you draw a schematic from the board?

What are U1 and U3?

 

Hello and thank you for your response dear Dennis, I completely don't know because I didn't make it, I just bought it fully working but when my wife plugged a 18V power supply it stopped working, do you think that U1 and U3 might be burned out?

 

Can't say what could have been damaged without seeing a schematic. Is there any physical damage that you can see? Components that fail may have visible indications.

 

I suspect it might be U3 because when I connect a wire around the IC the charging Led will go sometimes Red Or Green, but can you help me to find this type of IC, I just need the reference so I can order it

 

Can you remove and replace surface mount components?

 

Yes I can do it

 

Trace the components and connections on the board and make a schematic.

The SMT components might have actual part numbers or markings that can be cross referenced to standard parts.

Look for any components that show signs of physical damage.

 

Take a look at the ICs with a bright light and a magnifying glass. Move the light to different angles. I’ve seen labels appear when I thought there was none.

 

What exactly happened? Laptop 18v charger was plugged into a desktop LED lamp?

Maybe as a lessons-learned experience you just bypass that board and make the lamp a on/off lamp only, with a small toggle switch somewhere?

The time/effort and cost of new parts is probably way more than just buying a new lamp.