Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

[q5q]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

Nope same thing with or without cmos battery, only when it’s not draining it turns on… then it drains and won’t turn on next time

[q5q]

Dell Vostro 3500 (LA-K033P) RTC Draining/LED Code

I am making this thread as sort of a follow up thread to my previous one as issue on there was fixed. (https://www.badcaps.net/forum/showthread.php?t=119200)

When the charger is plugged into the laptop the white light comes on for about 5 seconds then fades out, then it starts blinking 3 orange 5 white (CMOS battery error LED code). This happens regardless of if there is a cmos battery in or not. I did change the cmos battery and it turned on for 1 boot and it said date and time not set (was still showing LED error code at this time) ... then i took charger out and tried again, this time it didnt power on just the led code again. Before I put the battery in it was around 3.2V but when I took it out around 20 minutes later it had fallen to just below 3V.

Things ive tried: bios flash, new cmos battery.

Schematic: https://www.badcaps.net/forum/showth...65#post1216565

[mcplslg123]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

Type "RTC" as keyword in search box of schematic and search it. Remove all the caps one by one connected in RTC circuit and see if problem goes away. However, going by my experience, you are staring at a partially shorted RTC section of PCH. Boardview is a must to locate those caps. Do check resistance to GND on +RTCBAT. The link to schematic is not working, so cant be precise in suggestions. Btw, What is the resistance to GND on +3V LDO?

[piernov]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

Dual diode can be leaky too.

[q5q]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

Type "RTC" as keyword in search box of schematic and search it. Remove all the caps one by one connected in RTC circuit and see if problem goes away. However, going by my experience, you are staring at a partially shorted RTC section of PCH. Boardview is a must to locate those caps. Do check resistance to GND on +RTCBAT. The link to schematic is not working, so cant be precise in suggestions. Btw, What is the resistance to GND on +3V LDO?

+RTC_CELL_VBAT Res to GND is 0.750 Kilo ohm
LDO_3V3 (Think this is what you want me to check is) is 54 kilo ohm to GND

I have a boardview in Xinzhizao software

[mcplslg123]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

+RTC_CELL_VBAT-Resistance is too low at 0.75K. Try what i suggested at post#43 and do check the dual diode as suggested by piernov.

[q5q]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

I have tried removing/replacing/testing almost everything in RTC circuit with no luck, might just need to buy a new motherboard PCH likely dead.

[mcplslg123]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

I too has faced RTC circuit fully or partially shorted specially on dell's 10th/11th gen. Seems like a very common fault.

[q5q]

Re: Dell Vostro 15 3000 (i5-11th Gen) 3 Orange 5 White LED Code

Very annoying, spent so long working on it too. I guess its good for learning at least.