Hello!
i have the same problem, changed the rts5455 and 6sS30A from donor board, but still only 5V charging...The original problem was a bad C-type connector, i replaced that also and still no charging...replaced the two chips, still the same...charged the battery ,did a bios update...still nothing...what next?
huzo
Senior Member
Last Activity: Today, 12:38 PM
Joined: 09-27-2014
Location: ZAGREB
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I have the oppostie problem, laptop works on board ram, but does'n when i put the ram in the slot...
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Now this is a fast service
tnx man!
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Yes Peste i know i was saying the laptop is in another city and is there a master password or code generator according to S/N...
Here is the dump.... Serial : PF20YY42...Leave a comment:
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So there is no other way* Because i have to get the laptop and dump the bios...Leave a comment:
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Guys can anyone find the password with only serial number, or i have to dump the bios? The laptop is in another town at the customer...
Here is the serial PF20YY42Leave a comment:
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There are caps, but they don't test short...the lines go directly from PCH, it's different from LVDS system...The hdmi and edp lines go from different PCH pins...
The board is thrown to the scrap for parts, i've got another board from broken laptop and with bad battery...Leave a comment:
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i tried,cant see any voltage...
i've tried two other screens,all the same...
I've checked,the signnals are going directly to the PCH,EDP is different from LVDS,has no switching chip...so probably something in PCH is bad...HDMI data lines also go directly to PCH...So probably PCH?Leave a comment:
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Yeah i've measured them,they are not shorted...i don't have an osciloscope to measure signals...i am going to look further....Leave a comment:
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I apologise ,i was nervous that day and tired and didn't see properly,you are ofcourse right and once again i do apologise to you, i know you are senior members and professionals...I honestly didn't see pins 30/31 because there is something writen over them...I thought they renamed the +LCDVDD to something else and the language barrier got us to misunderstanding...
[USER="169897"]piernov[/USER] as i mentioed above, i apologise for my behaviour, i know both of you from the forum and i know you are pros...but i somethimes loose my mind and say stupid things
Ok, i will...
Last edited by huzo; 02-19-2025, 12:04 PM.Leave a comment:
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It is NOT called +LCDVDD, it's not my first time using the schematics
...and for some reason i can't search inside pdf and i can't copy any text...For example there is a word, and when i copy it i get random signs..for example it says +3.3V_RUN_UT9(some random text) and when i copy it i get /!01212 # ...i don't know if it's some kind of a security feature or what...But if you look at the image at first post .there is no +LCDVDD pin...
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i have attached the edp connector pinout...there is no +LCDVDD there mentioned---There is +BL_PWR_SRC , +5V_TSC also presentLeave a comment:
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Dell 5590 no image on LCD,HDMI works ,the board works...
The board is LA-F411P ,DELL 5590 ...
The screen polarises,no backlight,no image,only black screen,tried another screen,the same,so there is no backlight,but there should be an image when i shine a lamp behind the screen,but there is none...only dark screen...when screen is connected and i press F8 to turn the image over to the external monitor, the external monitor gets coloured bars ,but when i disconnect the cable from the EDP ,the HDMI picture is good...What could be the problem? I don't have another edp cable, but i measured it with meter and it comes out good...i am baffled...... -
did that, all the same...i give up...Leave a comment:
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the FET is [B]3P3R0[/B] P -channel...it works,everything works, except the meter for the battery percentage...it is now charging the old battery with 600mA...the board has a problem that it doesn't see SDA or SCL in the I/O controller probably...maybe i should put the original 9538H chip, since there was no continuity to the SCL pin from the battery, there was 3.01V and OL on the instrument, and i have put the wire directly from the 9238H to the battery connector and now i have 3.46V on both pins and direct connection...but maybe this 9238 is not the same as 9538?the FET is [B]3P3R0[/B] P -channel...itLast edited by huzo; 02-07-2025, 11:48 AM.Leave a comment:
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For few seconds 8.8V on the D and G side of mosfet ,that is the pin #31 and #32 , S side , or the battery terminal is 0V. then it drops to 8.01V od the D and G side...Leave a comment:
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Sorry,not 100, 10Ohm, i had an excess zero...Leave a comment:
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I don't think that part is connected to the circuit,but there you go...the resistor is droping from 180-125Kohm... probably chartging some cap and it reduces the resistance... Diode leads don't connect to that transistor,or whatever it is...it's anodes go to one another......
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for all the newcomers, both diodes measure 0.580 in diode mode.... i have checked the pin 17 with battery voltage when on battery and adapter voltage when on power adapter,pin 18 also,pin 19 is 5V,pins 21 and 22 are around 3.45V, pin 26 has the resistor 100k and 2,8V ,that's ok,31 and 32 are on mosfet G and D and that's ok, other ugate and phase are working since the battery is charging...what else to look?Leave a comment:
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I know that, and i tested that already... i am not that novice So we have SDA and CLK to the 9238h, All the pins are present, battery is charging and depleting, but the meter shows 0%...
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