HP DV7-2120ed - no video - CAPS lock keeps flashing

[ed1973]

I have this laptop for repair with no video output.

screen -> no video
VGA and HDMI -> no video

Laptop turns on and Caps lock keeps blinking.

Took the mobo out and discovered 2 video chips:

AMD RADEON IGP 0922 MADE IN TAIWAN P0N866.00 215-0674034 (small chip)
ATI 0924 MADE IN TAIWAN P0P990.00 216-0728014 (bigger chip)

I think it is pretty sure, not 100% sure, that the GPU has to be reflowed or reballed.

Which chip would need to be reflowed or reballed ?
What do you think ?

[dj_ricoh]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Video chip got memory aside

[ktmmotocross]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

when i see ATI system i always reball NB.

[ed1973]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Oke thanks :-) I am going to reball the ATI chip.

@ktmmotocross : What do you mean by NB, I suppose you do not mean North Bridge ? Little bit confused.

Besides there is another BGA chip: AMD SOUTHBRIDGE 0923 TAIWAN P0P724.00 218S7EBLA12FG , which is an I/O Controller chip.

Aha, just found out that the AMD RADEON IGP chipset is the North Bridge chipset.

[ed1973]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Desoldered AMD RADEON IGP and cleaned mobo and chip.

The chip looks fine, but the mobo looks like if solder paths are missing.
They do not seem crucial because none of the paths are connected.

I made a closeup picture with my macro lens, can you maybe take a look ?

[PlusCom]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Those pins are dummy don't worry about them. 215-0674034 needs to be replaced, they are going bad very often. If you'll just reball it it will come back to you very soon.

[ed1973]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

This is very important information, thanks a lot.

Some time ago I saw this video:

https://www.youtube.com/watch?v=1AcEt073Uds

But concluded that reballing is not always bullshit, I am doing a lot of ps3 reballs and have a ps4 in stock that needs a reball.

But another question, how can I find out in advance, whether or not it is better to replace a chip by a new one ?

[desert-rat]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

I found a h.p. dv6000 as is at a pawn shop for $10 . No battery , cd drive , hard drive or power supply . I just found a 30v power supply at good will . The plug fits and makes the blue lites work , but nothing else .

[PlusCom]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Louis knows what he's talking about, you always have to replace a chip with new one. I always do and I have no returns at all. I know people that doing reballing and they have returns all the time. The problem with those chips is inside the crystal and not below it.
Consoles is a totally different story.

[ed1973]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

I understand that it is always best to replace the GPU.

Is there an overview somewhere of all problem laptops and gpu types ?
But, not all chips do have problems inside the crystals, right ?

It is best to have those new chips in stock right ? Otherwise customers need to wait longer. I can order from http://www.ic-chipset.com , but that will take 8 days.

Does somebody know a shop in Europe who sells new BGA chips ?

[dj_ricoh]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Louis knows what he's talking about, you always have to replace a chip with new one. I always do and I have no returns at all. I know people that doing reballing and they have returns all the time. The problem with those chips is inside the crystal and not below it.
Consoles is a totally different story.

he's a prick!

he swears a lot! "description of a FET" voltage goes in here then in here ohh but it comes from here!


if you wanna learn something go watch tom66 videos on ytube

ubuntututorials

[ed1973]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

Thanks, I will check those video's tomorrow.

I was not so keen on the attitude of the person in the youtube video.

[Life Goes On]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

he's a prick!

he swears a lot! "description of a FET" voltage goes in here then in here ohh but it comes from here!


if you wanna learn something go watch tom66 videos on ytube

ubuntututorials

Do you have the youtube link to tom66.

[dj_ricoh]

Re: HP DV7-2120ed - no video - CAPS lock keeps flashing

I gave you the user name
Ubuntututorials