patpin
Member
Last Activity: 02-10-2018, 04:25 AM
Joined: 06-18-2017
Location: luxembourg
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Dont have a bios flashing tool or a spare battery. The battery tension is 10.8V? Can you tell me why the CC-set on the KBC is set to 0V. Can it be because the CMOS batt is 2.96V. Thanks... -
HP compaq presario mobo; not charging and no power led ;
CQ71 model 450EB ( DA00P6MB6D0 rev D ) ; AC power led at AC connector is ON; the one at the bottom left of the PC (on the audio board) indicating the presence of an AC external PSU is OFF, as is the charging LED;
I have been looking for the reason why the batt is not charging and discovered that the PU5 (ISL6251) pin called CHLIM is at 0V which shuts down the charger IC. The CHLIM is coming from the U20/KBC (ICH9) CCset pin (pin 68): This pin is at 0 at the KBC; My question is why. I checked the TEMP_MBAT: 1.54V; is this OK? and are there other signals to consider at the KBC which could... -
Re: HP CQ71;No LEDS except connector LED 6 sec.
Nobody an idea?Leave a comment:
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Nobody can help me?Leave a comment:
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OK. In the mean time can we look at the charger not functioning? charge led is OFF. BAT V remains 10.3V
PU5 has 5V on PIN 1;
ACSET (on the PR99): 2,09V
6251EN: (on the PR98): 1,15V
UGATE (on the PQ6 pin 4): 10V; no pulses; L gate 0V but no pulses (pin 4 on PQ4)
VREF PIN 8: 2,77V
Should receive CC-SET from KBC: I measure (on PR102): OV (I think it should be 1.2V)
Probably same cause: KBC not functioning?...Last edited by patpin; 12-15-2017, 11:47 AM.Leave a comment:
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The problem is I have no programmer. On the other hand I have a scope. Do you have an idea on why PIN 5 of BIOS is so low ?...Leave a comment:
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Boardview R4 manual search
Hello, I have Boardview from Toptest Technologies V3 R4 for Windows and cannot find a manual forr it. Anyone can helmp me. Thanks -
Re: HP CQ71;No LEDS except connector LED 6 sec.
Forgot to mention that the LED at the female external-PS-connector remains OFF. Havent found the label for that LED.
I have charged the MBAT to 10.5V.
Is correct 3.3V at 8; only 0,033 at pin 5. CMOS BATT+ is 2.96V
The power button goes to 0V on pressing.
The RSMRST# remains at 0V also on pressing.
DNBSWON#1 measured on D18: is 3,35 and remains when pow.butt pressed (with DMM and Bitscope)
LID_EC# is 3,3V so I guess this is an OPEN LID .
I have 3.3V at KBC on PIN 67. KBC is not...Last edited by patpin; 12-15-2017, 05:57 AM.Leave a comment:
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Re: HP CQ71;No LEDS except connector LED 6 sec.
Not shorted; I have 19V at PQ48....Leave a comment:
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Re: HP CQ71;No LEDS except connector LED 6 sec.
The S5_ON Doesnt come ON after pressing POW BUTTON. KBC death? How can I test?Leave a comment:
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HP CQ71;No LEDS except connector LED 6 sec.
Hallo,
I m checking a MOBO DA00P6MB6D0 rev D.
With or without battery I see a Led coming ON at the ext. power connector when connecting it. After 6 seconds it goes OFF. No other LEDS ON; Pow butt does nothing.
At the ext.DC IN connector:
pin 3 =1,5V=also present when LED OFF
Pin 4: 2,65V when LED ON ; otherwise 0V
Can someone help me? Thanks -
Re: Compaq Presario CQ71 black screen
no I dont have .
but I could finally do a test with the keyboard connected (had forgotten it at friends home):
I have tested with different known good RAMS.
1/ I have put in both slots: 512MB 2Rx16 PC2 5300S 555 12
- when simply powering on: No beeps or led codes . (charge led is ON; POW led ON; HDDLED 2 or 3 sec.ON; numlockled on; Capslock led 1 sec on.
-when I pressed the power button with simult. pressing WIN B. Now I hear beeps: beep beep wait beep pattern. first and second are longer...Leave a comment:
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Re: Compaq Presario CQ71 black screen
How can I do this with a black screen?...Leave a comment:
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Re: Compaq Presario CQ71 black screen
very funny... maybe you also can tell me where to find the R values...Leave a comment:
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Re: Compaq Presario CQ71 black screen
Somebody can give my the resistance of both? I cannot find it. Thanks...Leave a comment:
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Re: Compaq Presario CQ71 black screen
Hello, I have now 3.3V at VLCD_CON and on BLON_CON which is OK.
No signal on VADJ1 or R526 / R524. What can be the cause?Leave a comment:
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Re: Compaq Presario CQ71 black screen
Its days that I am looking for it.....Many thanks Piernov!!!!! fantastique;
Leave a comment:
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Re: Compaq Presario CQ71 black screen
Can anyone help me with a board view of this board: Compaq Presario CQ71 model 450EB
Product : VZ654EA#UUG
board : DA00P6MB6D0 rev D
Thanks
Leave a comment:
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Compaq Presario CQ71 black screen
Hello,
I have a blackscreen at booting.
I blow the double USB port at the right hand of the laptop.
I had a normal functioning PC afterward except those 2 USB ports not functioning anymore.
After opening the PC and closing it again the black screen problem started.
This is what I 've done since:
(All tests are with disconnected USB flat cable at the inside since the double USB port at right had side is not functioning anymore (my fault: I had put 12 V on USB SATA interface at a connector where 5V was inspected)).
TEST with external POWER...Last edited by patpin; 07-19-2017, 06:02 AM.
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