Dell Inspirion 3505 - GDI53 LA-K001P PD1 transistor

Laptop : Dell Inspirion 3505
Motherboard : GDI53 LA-K001P Rev:1.0(a00) 2020-06-24

Hi, I'm looking for PD1 Transistors number. transistor is blown and can't make out what it says

PD1 = TVNST52302AB0. You can replace with BAT54A (the A suffix is ​​very important, because this diode has three other varieties: BAT54 without the suffix, BAT54C and BAT54S and all these are NOT pin-compatible with TVNST52302AB0).

matic napisał(a):Not true.

@Matic, please note that Dell uses a range of various diode types on ADAPTER_ID protection circuit, including BAT54 and BAV99 series small signal fast switching diodes. That's why I have suggested that BAT54A can be used here.

thankyou very much guys, got the part and fitted all is good now

ComputerDen napisał(a):got the part and fitted

Which part number, actually? BAT54A or PESD24VS2UT?

Ok so I've since tried both, it did work initially but I think that may have been a fluke as I have not managed to get it to turn back on since baring a few random moments that seemed to have no pattern. so i could not seem to find any of the those transistors the correct size so i did have to run some wires which i know is not the best but i just wanted to see if it was just that, are you aware of any other issues i can look out for? as far as i can tell there are no shorts nothing is getting too hot and all other components are testing fine although I don't have anything to compare with for working values on resistors ect

I can do the physical work replacing components. it's the diagnostics that I'm still figuring out I can do much more when I have board views available but I'm essentially blind on this one. there is no need to gate keep repair. all I was asking for is something like oh it might be this IC and I would have done my own research from there. I was ready to send it into elvikom labs once I had at least given it my best efforts. I appreciate your help so far just remind yourself we all start somewhere.

ComputerDen napisał(a):it's the diagnostics that I'm still figuring out I can do much more when I have board views available

Unfortunately, no documentation is available for this motherboard yet, however, you can use almost any Dell laptop documentation as they are pretty similar regarding PSU detection circuit. Please measure the voltages in reference to ground on all pins of PQ1 and PQ2 transistors (PSU connected). Please also check the soldering on PL3 ferrite bead as it seems from one of your photo that one of the pins is not soldered properly (lack of solder).