What is this chip ? Marking RE=7E

[Ado02]

Can anyone tell me the correct model number for this chip?

It's the one with RE=7E

Thank you..

[stj]

Re: What is this chip?

what is it from? we may have schematics

[SMDFlea]

Re: What is this chip?

It could be a richtek RT6585C



https://www.badcaps.net/forum/showpo...84&postcount=2

Is the motherboard part number NM-C921 ? https://www.badcaps.net/forum/showthread.php?p=1052338

.

[Ado02]

Re: What is this chip ? Marking RE=7E

Thank you for your replies.

The motherboard is from a Lenovo Legion 5 - the laptop needed a screen change after being dropped. On installing the new screen then laptop would not power on. No sign of life.

The component in question is getting very hot and looks likes it's got a burn mark.

Please see the attached image for the motherboard model number.

If someone has the schematic for this board please 🙏 let me know.

Thank you

[Ado02]

Re: What is this chip?

It could be a richtek RT6585C



https://www.badcaps.net/forum/showpo...84&postcount=2

Is the motherboard part number NM-C921 ? https://www.badcaps.net/forum/showthread.php?p=1052338

.

That is the same problem but I would not say the screen was the problem.

[Ado02]

Re: What is this chip ? Marking RE=7E

Could the problem be caused because the original screen was 120mhz and the replacement 144mhz?

[SMDFlea]

Re: What is this chip ? Marking RE=7E

Thank you for your replies.

The motherboard is from a Lenovo Legion 5 - the laptop needed a screen change after being dropped. On installing the new screen then laptop would not power on. No sign of life.
The component in question is getting very hot and looks likes it's got a burn mark.
Please see the attached image for the motherboard model number.
If someone has the schematic for this board please 🙏 let me know.

Thank you

The motherboard part number will be silkscreened in white somewhere. When you find it use the forum search,it might be posted already,or post your request in the "Schematic Requests ONLY!" section here: https://www.badcaps.net/forum/forumdisplay.php?f=41

[SMDFlea]

Re: What is this chip ? Marking RE=7E

Could the problem be caused because the original screen was 120mhz and the replacement 144mhz?

I doubt it,it was probably caused from something shorting when dropped.The lvds cable could be damaged

[xnRS]

Re: What is this chip ? Marking RE=7E

well as SMDFlea said - it 99% is Richtek RT6585C
Check VIN pin on chip(SMDFlea gave link to datasheet) and check other pins(IMHO LDO3 and 5 are most important as they are 3.3V and 5V) so maybe it's not chip, but it probably is