mb code:
hstnn-137c 6050a2136401-mb-a03
hp compaq presario b1200 no power
burnt mosfet AM4825P_AP
replaced with same but still no power
correct me if im wrong please
but wont the 19v in pin 1-3 of q1001 also goes to pin 5-8
somehow, 19v wont get past mosfet q1001
it seems like mosfet wont switch?
attached are the schematics
please help
thanks in advance guys ...
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
acer aspire v5 series no display
hi
schematics needed please
acer aspire v5 series
model:ms2377
aspire v5-122p-0643
motherboard code:
angel_tm mb
12281-1
48.4lk02.011
no display
looking for shorted component
thanks in advance guys
-
acer aspire v3-471g & 4730z turns off 1 sec
hi guys
as stated in title
both when turned on with pwr bttn, turns off almost instantly
5v,3.3v present
no component heating up
checked all coils to ground, no short
also can i please have a copy of the schematics for this model?
having a very hard time looking for it..
acer aspire v3-471g
mb: da0zqsmb8e0 rev:e
model: zqs
acer aspire 4730z
mb:jal90 la-4201p
rev:1.0
thanks in advance guys
-
Re: dell inspiron mini 1012 not charging batt
thanks for the replies
@sanehdeep
unfortunately pl10, pl 15 and pr178 is good.
al three components have 9.2v
but when checking pin 18 of u16 its 0.7v...
@proman28
can i have a copy of that bios version
couldnt find it on the internet
@loser18
sorry for my next question but how exactly do i check for signals?
do u mean voltages? or if its short to ground? can it be done using dmm?
and yes the battery shows on...
-
Re: dell inspiron mini 1012 not charging batt
thanks for all the replies guys
@sanehdeep
voltages of jbatt with battery on:
pin 1 - 9.2v
2 - 9.2v
3 - 3.2v
4 - 0 v
5 - 2v
6 - 5v
7 - 5v
voltages of jbatt without battery
pin 1 - 0.6v
2 - 0.6v
3 - 7 same as with battery
should i replace the charging ic (ISL6251) again?
@proman28
hi proman unfortunately i couldnt find the bios version a02 so i tried upgrading the bios to a12 in...
Leave a comment:
-
Re: dell inspiron mini 1012 not charging batt
@sanehdeep2012
checked pq35, pq39 out of circuit, both are good
resistance for pr178 is 1.4 ohms in my dmm
here are the voltages of u16
pin 1-5.0v
2-4.7v
3-0v
4-0v
5-0v
6-0v
7-0v
8-2.3v
9-0v
10-0.8v
11-0v
12-0v
13-0v
14-0v
15-5.0v
16-5.0v
17-0.6v
18-0.7v
19-20v
20-20v
21-0.8v
22-0.6v
23-0v
24-20v
thats my second replacement for isl6251 ...
Leave a comment:
-
dell inspiron mini 1012 not charging batt
hi guys
got a dell inspiron mini 1012 that is not charging
have replaced the burnt charging ic with new one
(ISL6251AHAZ)
now it says plugged in,charging but battery is stuck at 0%
have replaced the battery also but still the same
any ideas?
thanks in advance ...
-
Re: msi cr400 - no display
thanks for the reply fddizon
but already checked all components out of circuit towards the direction of the short, i ended up below the vga chip mcp79mvl-b3
its like the line of +mcp79_core is shorted?..
thought it was normal because in your other post you said that the vga is short and still the 4 x 330uf capacitors worked right?
again thanks for your time ...
Leave a comment:
-
Re: msi cr400 - no display
probes touching is 0 ohms
yes, 7 ohms is without processor plugged
resistancce of
pl3=303
pl4=821
pl5=0
pl6=850
pl7=223
pl8=1013
pl9,pq38 and pu11 are empty
but pins are there see attached photo...
Leave a comment:
-
Re: msi cr400 - no display
@fddizon
well thats about it, there is no display
no beeps no blinking lights no change on screen
@atsio
meter shows there is 7 ohms under nvdia chip
@lezsimply
vcore is 0.01
already removed the nec/tokin type capacitor and replaced it with 4 x 330uf tantalum capacitors but still no display
thanks for the replies guys
Leave a comment:
-
-
msi cr400 - no display
hey guys
have a msi cr400 with no display
already replaced proadlizer capacitor with 4 x 330uf tantalum
but still no display
havent done a reflow yet but checked capacitors under the nvidia chip it shows 7 ohms? is that considered a short circuit?
also dont know if its related or unusual but when plugging in the charger, the led in the charging battery indicator flashes once and then once again after removing the charger
thanks in advance guys
-
TOSHIBA SATELLITE c855-s5352 overheating southbridge
hi guys
toshiba satellite c855-s5352
mb code: DK10F-6050A2541801-MB-A02
southbridge is overheating
laptop turns off after 5-10 mins
board has no short
voltages surrounding and under sb is 0/1.8/5v
any ideas whats causing the heat?
thanks in advance!
-
acer aspire 4752 JE40 HR MB 10267-4 no power
hi guys
just want to know what you thinkk about this and if a replacement is needed
thanks in advance
its an acer 4752 no power liquid spilled
3.3v/5v power ic
rt8223mgqw-gp-u1
pin
1=1.17v
2=0.02
3=1.98
4=1.98
5=1.26
6=1.26
7=0.28
8=3.37
9=4..6
10=0.28
11=0.28
12=0.0
13=2.71
14=3.38
15=0.0
16=19.31
17=5.01
18=3.35
19=0.0
20=0.06
21=0.06
22=4.59
23=3.32
24=0.06...
-
Re: acer aspire 4720z no power fixed but..
thanks sir tonyradu!
installed its modem and the auto restart is gone
Leave a comment:
-
acer aspire 4720z no power fixed but..
hi guys
need help please
fixed this acer 4720z no power with shorted ceramic capacitor
now it turns on after 2 seconds it turns off it repeats for 6 times
and then it boots
please help
thanks in advance guys!
-
Acer aspire 4736z KALG0 LA449P (not turning on)
Hi guys
Acer aspire 4736z KALG0 LA449P not turning on but there is power
But charge light near power switch is on
Checked power switch pin1 its 17.30v, and when pressed turns to 0v
Then back to 17.30v
Is that normal???
Replaced nec/tokin 0e907 with 4x330uf tantalum caps
Please help
Thanks in advance guys
-
Re: toshiba satellite m305 no power
thanks for the reply and schematics guys
sorry for not posting the mainboard code, will do next time
thanks again
Leave a comment:
No activity results to display
Show More
Leave a comment: