dell latitude e5470 not charging

[dqtech]

this laptop no have 12v on pbatt1, but it should right?...i have another dell laptop different model and it has 12v on pbatt...i found this schematic and boardview is not for e5470 but the marking is same...ive try bypass PSID but no luck, still not charging

[mon2]

Attached.

[dqtech]

Attached.

thank you sir...i see that the problem is from pbat_pres#_c is not pulled down to 0v and he change the charging ic right....but mine it does pulled down to 0v when i inserting the battery...or i should try to replace the charging ic also?...because if so,i have to order the ic first since i dont have bq24777 ic right now

[mon2]

No. Do not replace the charger IC..yet.

Does the laptop power up with the power adapter? If yes, what does the BIOS report for the power rating of the adapter? If not a match then the PSID needs to be reviewed.

[dqtech]

No. Do not replace the charger IC..yet.

Does the laptop power up with the power adapter? If yes, what does the BIOS report for the power rating of the adapter? If not a match then the PSID needs to be reviewed.

yes laptop does power on with adapter...even im using dell adapter it saying adapter Unknown...perhaps adapter is not original maybe?

[mon2]

Issue is with the PSID since the adapter details cannot be properly detected.

Attach the power adapter, what is the voltage to ground on PL4 (either side is ok). This voltage must be ~3 volts. Respectively, this same contact must be able to mate with the center needle like pin of the adapter connector. Confirm that this center pin is not bent on the power adapter. Confirm this pin is able to mate with the motherboard's power connector.

Is the power adapter a known good model that functions with another Dell ok? If not, source a known good adapter for testing. When the PSID is not functioning as it should, the motherboard speed will be throttled and the battery charging function will halt.

[mcplslg123]

Check the 33 oms resistor on psid line. It often fails.