Identify an electronic component

[mybestkatkout]

Hello,

I need your help to identify this small component to be able to change it

velleman dvm9912

Thanks

 

[narkeleptk]

Codebook say it may could be **broken link removed**
See if it makes sense in your circuit.

 

[mybestkatkout]

Hello

It is labeled U4 I do not think it's a transistor ):

 

[mybestkatkout]

can you see in the photo it's right after the battery and before U5

 

[narkeleptk]

Yes, I see what you mean. Why don't you try and make a small schematic of the ciruit its involved with. Perhaps someone can better instruct you,